{"id":249286,"date":"2022-09-12T13:42:41","date_gmt":"2022-09-12T11:42:41","guid":{"rendered":"https:\/\/sherpas.com\/blog\/?p=249286"},"modified":"2025-01-08T21:57:46","modified_gmt":"2025-01-08T20:57:46","slug":"comment-calculer-une-aire","status":"publish","type":"post","link":"https:\/\/sherpas.com\/blog\/comment-calculer-une-aire\/","title":{"rendered":"Comment calculer une aire ? &#8211; 6\u1d49 \ud83e\udd28"},"content":{"rendered":"\n<p>Parmi toutes les mati\u00e8res enseign\u00e9es au coll\u00e8ge, les math\u00e9matiques font partie des moins appr\u00e9ci\u00e9es. Chez les Sherpas, on ne pense pas que tu aies une haine envers les maths !&nbsp; Peut-\u00eatre juste que tu ne les comprends pas bien. Pour te faciliter la t\u00e2che, voici une<strong> fiche de cours<\/strong> sp\u00e9ciale <em>Comment calculer une aire ? <\/em>Un chapitre in\u00e9vitable dans ton <a href=\"https:\/\/sherpas.com\/blog\/tout-savoir-programme-maths-6eme\/\" data-type=\"post\" data-id=\"190142\">programme de maths de 6\u1d49<\/a> et qui va te servir toute ta vie ! <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quest-ce-quune-aire\">Qu&rsquo;est-ce qu&rsquo;une aire ?&nbsp;\ud83d\udcd6 <\/h2>\n\n\n\n<p>En math\u00e9matiques, <strong>une aire correspond \u00e0 la surface occup\u00e9e par un objet ou la taille d\u2019une pi\u00e8ce<\/strong>. Cette valeur est exprim\u00e9e au carr\u00e9 (cm<sup>2<\/sup>, m<sup>2<\/sup>\u2026). <\/p>\n\n\n<section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p>Par exemple, ton t\u00e9l\u00e9phone est pos\u00e9 sur ton bureau. <strong>L\u2019espace qu\u2019il occupe repr\u00e9sente son aire<\/strong>. C\u2019est pareil pour ta chambre ou ton appartement, en calculant son aire, tu calcules sa superficie !<\/p>\n<p>&nbsp;<\/p>\n<p>\ud83d\udc49 Tu peux en d\u00e9duire que chaque objet qui t\u2019entoure poss\u00e8de une aire. Sympa, non ?<\/p>\n\n        <\/div>\n              <\/section>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"a-la-base-ca-sert-a-quoi-une-aire\">\u00c0 la base, \u00e7a sert \u00e0 quoi une aire ?&nbsp;\ud83e\uddd1\u200d\ud83c\udfeb <\/h3>\n\n\n\n<p>Pour savoir d\u2019o\u00f9 vient le calcul d\u2019une aire, il faut remonter le temps. Durant la <a href=\"https:\/\/fr.wikipedia.org\/wiki\/\u00c9gypte_antique\" target=\"_blank\" rel=\"noreferrer noopener\">Haute Antiquit\u00e9 en \u00c9gypte<\/a>, entre 3 300 et 525 ans avant J.C. En ce temps-l\u00e0, les \u00c9gyptiens d\u00e9terminaient l\u2019aire des champs pour r\u00e9partir \u00e9quitablement les r\u00e9coltes entre les agriculteurs. Et pour calculer l\u2019aire des pyramides ? \ud83e\uddd0 Peut-\u00eatre, mais \u00e7a on ne le sait pas encore.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/media.giphy.com\/media\/yoJC2k4dPDRSInYfjq\/giphy.gif\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"et-aujourdhui-a-quoi-ca-sert\">Et aujourd\u2019hui, \u00e0 quoi \u00e7a sert ?&nbsp;<\/h3>\n\n\n\n<p>Pour acheter un meuble, un canap\u00e9 ou une nouvelle t\u00e9l\u00e9vision, tout le monde prend des mesures. On regarde les dimensions qui correspondent \u00e0 l\u2019espace que l&rsquo;on souhaite remplir. Par exemple, si tu veux mettre un poster de ton idole (genre Will ou Etienne) sur ta t\u00eate de lit, tu vas visualiser sa taille. <em>Si tu ne prends pas de mesures<\/em>, <strong>tu prends le risque qu\u2019il soit trop grand ou trop petit<\/strong> ! <\/p>\n\n\n\n<p>\ud83d\udc49 Voici les cl\u00e9s pour que tu sois s\u00fbr de toujours prendre la taille qu\u2019il faut !&nbsp;<\/p>\n\n\n<section class=\"push \">\n        <div >\n            \n                                                <div class=\"push__container  qcd\" data-target=\"_self\" data-qcd=\"aHR0cHM6Ly9zaGVycGFzLmNvbS9mdW5uZWwtc3R1ZGVudC1xdWFsaWZpY2F0aW9u\" data-banner=\"2\" data-name=\"CPM1 Maths\" style=\"background-color: #F3FBF7\" >\n                                                                        <div class=\"push__teachers\">\n    <div class=\"d-flex justify-content-center d-md-none\">\n        <img decoding=\"async\" class=\"push__logo\" src=\"\/content\/themes\/sherpas-theme\/dist\/images\/logo.svg\" alt=\"Logo Sherpas\">\n    <\/div>\n    <div class=\"swiper\">\n        <div class=\"swiper-wrapper\">\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Louise2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Louise<\/p>                          <p class=\"push__teachers-school\">Mines ParisTech<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">24\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Nicolas2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Nicolas<\/p>                          <p class=\"push__teachers-school\">CentraleSup\u00e9lec<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">17\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Fabien2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Fabien<\/p>                          <p class=\"push__teachers-school\">T\u00e9l\u00e9com Paris<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">20\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Cle\u0301mence2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Cl\u00e9mence<\/p>                          <p class=\"push__teachers-school\">HEC Paris<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">21\u20ac\/h\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Bastien2x.jpg);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Bastien<\/p>                          <p class=\"push__teachers-school\">Polytechnique<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">26\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Pierre2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Pierre<\/p>                          <p class=\"push__teachers-school\">ESSEC<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">16\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Simon2x.jpg);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Simon<\/p>                          <p class=\"push__teachers-school\">4e ann\u00e9e de m\u00e9decine<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">26\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Jade2x.jpg);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Jade<\/p>                          <p class=\"push__teachers-school\">Sciences Po Paris<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">21\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                    <\/div>\n    <\/div>\n<\/div>\n                                                    <div class=\"push__content\">\n                                                            <div  class=\"d-none d-md-block\" >\n                                    <img decoding=\"async\" class=\"push__logo\" src=\"\/content\/themes\/sherpas-theme\/dist\/images\/logo.svg\"\n                                        alt=\"Logo Sherpas\">\n                                <\/div>\n                                                                                        <div class=\"push__title\"><p>Besoin d&rsquo;un <span style=\"color: #4cc583;\">prof particulier<\/span> de maths ? <span role=\"image\" aria-label=\"\u2728\">\u2728<\/span><\/p>\n<\/div>\n                                                                                        <div class=\"push__text\"><p>Nos Sherpas sont l\u00e0 pour t&rsquo;aider \u00e0 progresser et prendre confiance en toi !<\/p>\n<\/div>\n                                                        <div class=\"push__promo-button   \">\n                                                                                                    <div\n                                        class=\"btn btn-primary\"\n                                        style=\"color: ; border-color: ; background-color: \"\n\n                                    >\n                                        JE PRENDS UN COURS OFFERT !\n                                    <\/div>\n                                                            <\/div>\n                                                    <\/div>\n                                    <\/div>\n                                    <\/div>\n    <\/section>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lecon-du-jour-comment-calculer-une-aire\">Le\u00e7on du jour : comment calculer une aire ?<\/h2>\n\n\n\n<p>Dans cette fiche de cours, on te donne des formules et des explications Sherpas pour r\u00e9pondre \u00e0 la question : comment se calcule l\u2019aire d\u2019une figure ? \ud83e\udd72<\/p>\n\n\n\n<p>\ud83d\udc49 Pour \u00e7a, on va \u00e9tudier trois figures de cours : le <strong>carr\u00e9<\/strong>, le <strong>rectangle<\/strong> et le <strong>triangle<\/strong>. Puis deux figures que ton professeur risque de demander en \u00e9valuation : la <strong>pyramide<\/strong> et la <strong>sph\u00e8re<\/strong>.&nbsp;<\/p>\n\n\n<section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p>Dans chaque cas, dis-toi que <em>l\u2019aire<\/em> s\u2019exprime par un <em>A<\/em>.<\/p>\n\n        <\/div>\n              <\/section>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"comment-calculer-laire-dun-carre\">Comment calculer l\u2019aire d&rsquo;un carr\u00e9 ? \ud83d\udfea<\/h3>\n\n\n\n<p>L\u2019aire du carr\u00e9 est sans doute la plus simple \u00e0 apprendre. On cherche l\u2019aire (A) d\u2019un carr\u00e9. Un carr\u00e9 a tous ses c\u00f4t\u00e9s de m\u00eame longueur, qu\u2019on appelle C.&nbsp;<\/p>\n\n\n\n<p>La formule :<strong> A = C x C<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">Exemple.\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400\">Un carr\u00e9 poss\u00e8de des c\u00f4t\u00e9s de 4 cm.<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = C x C\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">On remplace par les chiffres.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 4 \u00d7 4\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 4 \u00d7 4 = 16\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">L\u2019aire du carr\u00e9 est de 16 cm\u00b2.<\/span><\/p>\n\n        <\/div>\n              <\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/sherpas.com\/blog\/content\/uploads\/2022\/09\/IMG_20220907_155516-1024x1024.jpg\" alt=\"Comment calculer une aire : le carr\u00e9\" class=\"wp-image-249287\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"calculer-laire-dun-rectangle\">Calculer l\u2019aire d\u2019un rectangle !&nbsp;<\/h3>\n\n\n\n<p>M\u00eame principe que pour le carr\u00e9, l\u2019aire (A) du rectangle se calcule en multipliant ses c\u00f4t\u00e9s. Cette figure comporte \u00e9galement 4 c\u00f4t\u00e9s. Mais ici, il y a deux valeurs diff\u00e9rentes : sa largeur (L) et sa longueur (l).&nbsp;<\/p>\n\n\n\n<p>La formule : <strong>A = L \u00d7 l&nbsp;<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">Exemple.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u00a0Le rectangle poss\u00e8de une largeur (L) de 3 centim\u00e8tres et une longueur (l) de 6 cm.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = L \u00d7 l\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">On remplace par les valeurs.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 3 \u00d7 6\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 18<\/span><\/p>\n<p><span style=\"font-weight: 400\">Donc le rectangle \u00e0 une aire de 18 cm\u00b2.<\/span><\/p>\n\n        <\/div>\n              <\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/sherpas.com\/blog\/content\/uploads\/2022\/09\/IMG_20220907_155434-1024x741.jpg\" alt=\"Comment calculer une aire : le rectangle \" class=\"wp-image-249291\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"calculer-laire-dun-triangle\">Calculer l\u2019aire d\u2019un triangle&nbsp;<\/h3>\n\n\n\n<p>Ici, on retrouve deux cas : le<strong> triangle quelconque<\/strong> et le <strong>triangle rectangle<\/strong>.&nbsp;<\/p>\n\n\n\n<p><strong>\ud83d\udc49 Le triangle rectangle <\/strong>qu\u2019on appelle EFG. Pour cette forme, le triangle poss\u00e8de 3 c\u00f4t\u00e9s : une largeur E, une longueur G et une hypot\u00e9nuse F. (L\u2019hypot\u00e9nuse est le c\u00f4t\u00e9 oppos\u00e9 \u00e0 l\u2019angle droit).<\/p>\n\n\n\n<p>Le triangle rectangle repr\u00e9sente la moiti\u00e9 d\u2019un rectangle et est compos\u00e9 d\u2019un angle droit. On va alors prendre les valeurs des deux c\u00f4t\u00e9s de cet angle, sa largeur E et sa longueur G.<\/p>\n\n\n\n<p>Et les multiplier. Ainsi, on obtient l\u2019aire d\u2019un rectangle, puis on divise cette valeur par 2, pour obtenir la valeur de l\u2019aire du triangle rectangle.&nbsp;<\/p>\n\n\n\n<p>La formule : <strong>A = L \u00d7 l \u00f7 2<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">Exemple.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">On a un triangle rectangle EFG o\u00f9 E est de 3 cm et G : 6 cm. On calcule l\u2019aire A.<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = L \u00d7 l <\/span><span style=\"font-weight: 400\">\u00f7<\/span><span style=\"font-weight: 400\"> 2<\/span><\/p>\n<p><span style=\"font-weight: 400\">On remplace par les valeurs.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = E x G <\/span><span style=\"font-weight: 400\">\u00f7 2<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 3 \u00d7 6 <\/span><span style=\"font-weight: 400\">\u00f7<\/span><span style=\"font-weight: 400\"> 2\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A= 18 <\/span><span style=\"font-weight: 400\">\u00f7<\/span><span style=\"font-weight: 400\"> 2\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 9<\/span><\/p>\n<p><span style=\"font-weight: 400\">L\u2019aire du triangle rectangle EFG est de 9 cm\u00b2. <\/span><\/p>\n\n        <\/div>\n              <\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/sherpas.com\/blog\/content\/uploads\/2022\/09\/IMG_20220907_160246-1024x685.jpg\" alt=\"Comment calculer une aire : le triangle rectangle\" class=\"wp-image-249294\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<p>\ud83d\udc49 <strong>Le triangle quelconque<\/strong>. Il s\u2019agit d\u2019un triangle dont les trois c\u00f4t\u00e9s peuvent \u00eatre de valeur al\u00e9atoire.&nbsp;<\/p>\n\n\n\n<p>Ici la formule est : <strong>A = b x h \u00f7 2<\/strong><br>Ne t\u2019inqui\u00e8te pas, on t\u2019explique. La <em>base<\/em> (b) de ton triangle est la partie la plus longue. Pour d\u00e9terminer la hauteur (h), il te suffit de prendre l\u2019angle oppos\u00e9 \u00e0 ta base et de faire un trait en angle droit sur la base.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">Exemple.<\/span><\/p>\n<p><span style=\"font-weight: 400\">On a un triangle quelconque MNO. La base en NO fait 5 cm. La hauteur est de 4 cm.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = b x h <\/span><span style=\"font-weight: 400\">\u00f7 2<\/span><\/p>\n<p><span style=\"font-weight: 400\">On remplace par les valeurs.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 5 \u00d7 4 \u00f7 2<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 20 \u00f7<\/span><span style=\"font-weight: 400\"> 2 = 10<\/span><\/p>\n<p><span style=\"font-weight: 400\">L\u2019aire du triangle est de 10\u00a0 cm\u00b2<\/span><\/p>\n\n        <\/div>\n              <\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/sherpas.com\/blog\/content\/uploads\/2022\/09\/IMG_20220907_160210-1024x1024.jpg\" alt=\"Comment calculer une aire : le triangle\" class=\"wp-image-249297\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>\ud83d\udccd<strong> Rappel<\/strong> : Pour d\u00e9terminer la valeur de la hauteur d\u2019un triangle, il te faut utiliser <a href=\"https:\/\/sherpas.com\/blog\/comprendre-le-theoreme-de-pythagore\/#:~:text=En%20formule%20%3A%20Si%20dans%20un,au%20carr%C3%A9%20de%20l&#039;hypot%C3%A9nuse\">le th\u00e9or\u00e8me de Pythagore<\/a> !<\/p>\n\n\n<section class=\"relance\">\n        <div >\n                            <a target=\"_blank\" href=\"https:\/\/sherpas.com\/blog\/vaincre-la-peur-des-maths\/\">\n                    <div class=\"relance__container\"\n                        >\n                        \n                                                        <picture>\n                            <source srcset=\"https:\/\/sherpas.com\/content\/uploads\/2021\/10\/Maths-YT.png\" media=\"(min-width: 999px)\">\n                            <source srcset=\"https:\/\/sherpas.com\/content\/uploads\/2021\/10\/Maths-YT.png\" media=\"(max-width: 999px)\">\n                                <img decoding=\"async\"\n                                    src=\"https:\/\/sherpas.com\/content\/uploads\/2021\/10\/Maths-YT.png\"\n                                    alt=\"Comment vaincre la peur des maths ?\"\n                                >\n                            <\/picture>\n                                                <div class=\"relance__content\">\n                            \n                                <div class=\"relance__title\"> <p>Si tu ne te sens pas bien face aux math\u00e9matiques, voici une solution !<\/p>\n<\/div>\n                                                        <button type=\"button\"\n                                    class=\"relance__button btn btn-white\">\n                                CLIQUE ICI !\n                            <\/button>\n                        <\/div>\n                    <\/div>\n                <\/a>\n                    <\/div>\n    <\/section>\n\n    \n\n<section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p>Surtout n\u2019h\u00e9site pas \u00e0 continuer de bien t\u2019entra\u00eener ! Si tu as besoin d\u2019aide pour une autre notion en\u00a0maths, n\u2019h\u00e9site pas \u00e0 regarder sur le blog si on n&rsquo;a pas une r\u00e9ponse \u00e0 ton probl\u00e8me ou simplement <strong>faire appel \u00e0 l&rsquo;un de nos centaines de <a href=\"https:\/\/sherpas.com\/cours\/maths\" target=\"_blank\" rel=\"noopener\">professeurs particuliers de maths<\/a> !<\/strong> \ud83e\udd13<\/p>\n\n        <\/div>\n              <\/section>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"un-bonus-pour-tes-evaluations\">Un bonus pour tes \u00e9valuations \ud83d\udc47<\/h2>\n\n\n\n<p>M\u00eame si les points pr\u00e9c\u00e9dents sont les formules que tu as pu voir en cours, il peut arriver que tes professeurs te testent avec des formes un peu plus complexes. En tant que bon Sherpas, on te donne deux petites <strong>formules suppl\u00e9mentaires <\/strong>pour que tu sois au top du top\u202f!<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"comment-calculer-laire-dune-pyramide\">Comment calculer l\u2019aire d\u2019une pyramide ?&nbsp;<\/h3>\n\n\n\n<p>Une pyramide se d\u00e9compose en deux parties. La base (peu importe sa forme) et les faces lat\u00e9rales. Dans le calcul de l\u2019aire totale d\u2019une pyramide, il te faudra donc faire deux calculs : l\u2019aire de la base + l\u2019aire des quatre faces lat\u00e9rales triangulaires.<\/p>\n\n\n\n<p><br>\ud83d\udc49La formule : <strong>A = A de la base + A des c\u00f4t\u00e9s<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">Exemple.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">On a une pyramide \u00e0 base carr\u00e9e.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Dans un premier temps, on calcule sa base : Largeur 5 cm, longueur 5 cm.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A= C x C\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 5 \u00d7 5\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 25 cm\u00b2\u00a0<\/span><\/p>\n\n        <\/div>\n              <\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/sherpas.com\/blog\/content\/uploads\/2022\/09\/IMG_20220908_122135-1024x1024.jpg\" alt=\"Comment calculer une aire : La pyramide\" class=\"wp-image-249300\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<p>Puis, on calcule l\u2019aire des faces. Ici, les faces sont des triangles \u00e9quilat\u00e9raux. Tous les c\u00f4t\u00e9s ont les m\u00eames valeurs, soit : 5 cm.<\/p>\n\n\n\n<p>Aire du triangle \u00e9quilat\u00e9rale : A = b x h \u00f7 2<\/p>\n\n\n\n<p>A = 5 \u00d7 5 \u00f7 2<\/p>\n\n\n\n<p>A = 25 \u00f7 2 = 12,5<\/p>\n\n\n\n<p>A = 12,5<\/p>\n\n\n\n<p>L\u2019aire d\u2019une des faces est de 12,5 cm\u00b2.&nbsp;<\/p>\n\n\n\n<p>Dans une pyramide \u00e0 base carr\u00e9e, les quatre faces sont identiques. Donc, les quatre auront la m\u00eame aire. Le total de l\u2019aire des 4 faces lat\u00e9rales est alors de 12,5 \u00d7 4 = 48.&nbsp;<\/p>\n\n\n\n<p>L\u2019aire totale des faces lat\u00e9rales est de 48 cm\u00b2.<\/p>\n\n\n\n<p>Maintenant qu\u2019on a toutes les donn\u00e9es, on combine les aires pour trouver celle de la pyramide.&nbsp;<\/p>\n\n\n\n<p>A pyramide = A de la base + A des faces lat\u00e9rales<\/p>\n\n\n\n<p>On remplace par les valeurs.&nbsp;<\/p>\n\n\n\n<p>A = 25 cm\u00b2 + 48 cm\u00b2&nbsp;<\/p>\n\n\n\n<p>A = 73 cm\u00b2&nbsp;<\/p>\n\n\n\n<p>L\u2019aire de la pyramide est alors de 73 cm\u00b2.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"comment-calculer-laire-dune-sphere\">Comment calculer l\u2019aire d\u2019une sph\u00e8re ?&nbsp;<\/h3>\n\n\n\n<p>Une sph\u00e8re est un objet rond dans l\u2019espace, mais qui n\u2019a pas de contenance comme une balle de ping-pong !&nbsp;<\/p>\n\n\n\n<p>Elle poss\u00e8de un diam\u00e8tre, c\u2019est-\u00e0-dire sa largeur. Et un rayon qui repr\u00e9sente la moiti\u00e9 du diam\u00e8tre. C\u2019est le rayon qui va te permettre de d\u00e9terminer l\u2019aire de ta sph\u00e8re, il repr\u00e9sente <strong>la moiti\u00e9 de ton diam\u00e8tre<\/strong>. On l\u2019appelle <strong><em>R<\/em><\/strong>.&nbsp;&nbsp;<\/p>\n\n\n\n<p>\ud83d\udc49 La formule : <strong>4 x \u03c0 x R\u00b2<\/strong><\/p>\n\n\n<section class=\"you-know\">\n                <div class=\"you-know__title\"><p><span style=\"font-weight: 400\">\u00c0 savoir ! \ud83d\udc40<\/span><\/p>\n<\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">\u03c0 = 3,14<\/span><\/p>\n<p><span style=\"font-weight: 400\">R\u00b2 = R x R<\/span><\/p>\n\n        <\/div>\n              <\/section>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><section class=\"you-know\">\n                <div class=\"you-know__title\"><\/div>\n                        <div class=\"you-know__text\">\n            <p><span style=\"font-weight: 400\">Exemple.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">On a une sph\u00e8re avec un rayon de 3 cm. On calcule son aire.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">A =\u00a0 4 x \u03c0 x R\u00b2<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 4 \u00d7 3,14 x (3\u00d73)<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 12,56 \u00d7 9<\/span><\/p>\n<p><span style=\"font-weight: 400\">A = 113,04 cm\u00b2<\/span><\/p>\n<p><span style=\"font-weight: 400\">La sph\u00e8re poss\u00e8de une aire de 113,04 cm\u00b2.<\/span><\/p>\n\n        <\/div>\n              <\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/sherpas.com\/blog\/content\/uploads\/2022\/09\/IMG_20220909_153616-798x1024.jpg\" alt=\"Comment calculer une aire : la sph\u00e8re \" class=\"wp-image-249386\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n<section class=\"push \">\n        <div >\n            \n                                              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xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">13\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Hugo2x.jpg);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Hugo<\/p>                          <p class=\"push__teachers-school\">Insa Lyon<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">16\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Martin2x.jpg);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Martin<\/p>                          <p class=\"push__teachers-school\">HEC Paris<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">23\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Nicolas2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Nicolas<\/p>                          <p class=\"push__teachers-school\">CentraleSup\u00e9lec<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">17\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Cle\u0301mence2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Cl\u00e9mence<\/p>                          <p class=\"push__teachers-school\">HEC Paris<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">21\u20ac\/h\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Pierre2x.png);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Pierre<\/p>                          <p class=\"push__teachers-school\">ESSEC<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">16\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                                            <div class=\"swiper-slide\">\n                    <div class=\"push__teachers-card\">\n                        <div\n                            class=\"push__teachers-profil\"\n                            \n                            style=\"background-image: url(https:\/\/sherpas.com\/content\/uploads\/2022\/01\/Victor2x.jpg);\"\n                        >\n                    <\/div>\n                         <p class=\"push__teachers-name\">Victor<\/p>                          <p class=\"push__teachers-school\">ESCP<\/p>                                                     <div class=\"push__teachers-note\">\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                                    <svg  class=\"active\" >\n                                        <use\n                                            xlink:href=\"\/content\/themes\/sherpas-theme\/dist\/images\/sprite.svg#star\"\/>\n                                    <\/svg>\n                                                            <\/div>\n                                                 <p class=\"push__teachers-price\">25\u20ac\/h<\/p>                     <\/div>\n                <\/div>\n                    <\/div>\n    <\/div>\n<\/div>\n                                                    <div class=\"push__content\">\n                                                            <div  class=\"d-none d-md-block\" >\n                                    <img decoding=\"async\" class=\"push__logo\" src=\"\/content\/themes\/sherpas-theme\/dist\/images\/logo.svg\"\n                                        alt=\"Logo Sherpas\">\n                                <\/div>\n                                                                                        <div class=\"push__title\"><p>Coll\u00e9gien en gal\u00e8re ? Ton premier cours est offert ! <span role=\"img\" aria-label=\"\ud83c\udf81\">\ud83c\udf81<\/span><\/p>\n<\/div>\n                                                                                        <div class=\"push__text\"><p>Nos profs sont l\u00e0 pour t\u2019aider \u00e0 progresser !<\/p>\n<\/div>\n                                                        <div class=\"push__promo-button   \">\n                                                                                                    <div\n                                        class=\"btn btn-primary\"\n                                        style=\"color: ; border-color: ; background-color: \"\n\n                                    >\n                                        J&rsquo;EN PROFITE MAINTENANT !\n                                    <\/div>\n                                                            <\/div>\n                                                    <\/div>\n                                    <\/div>\n                                    <\/div>\n    <\/section>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"bilan-comment-calculer-une-aire\">Bilan : Comment calculer une aire ?&nbsp;<\/h3>\n\n\n\n<table id=\"tablepress-1198\" class=\"tablepress tablepress-id-1198\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">L\u2019aire d\u2019un carr\u00e9<\/th><th class=\"column-2\">A = C x C <br \/>\n<br \/>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">L\u2019aire d\u2019un rectangle<br \/>\n<br \/>\n<\/td><td class=\"column-2\">A = L \u00d7 l <br \/>\n<br \/>\n<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">L\u2019aire d\u2019un triangle rectangle<br \/>\n<br \/>\n<\/td><td class=\"column-2\">A = L \u00d7 l \u00f7 2<br \/>\n<br \/>\n<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">L\u2019aire d\u2019un triangle quelconque<\/td><td class=\"column-2\">A = b \u00d7 h \u00f7 2<br \/>\n<br \/>\n<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">L\u2019aire d\u2019une pyramide<br \/>\n<br \/>\n<\/td><td class=\"column-2\">A = A de la base + A des quatre faces lat\u00e9rales<br \/>\n<br \/>\n<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">L\u2019aire d\u2019une sph\u00e8re<br \/>\n<br \/>\n<\/td><td class=\"column-2\">A = 4 x \u03c0 x R\u00b2<br \/>\n<br \/>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/media.giphy.com\/media\/gEvab1ilmJjA82FaSV\/giphy.gif\" alt=\"\"\/><\/figure>\n<\/div>\n\n<section class=\"read-also\">\n    <p class=\"read-also__title\">\u00c0 lire aussi<\/p>\n            <div class=\"read-also__list\">\n            <p><a href=\"https:\/\/sherpas.com\/blog\/comment-etre-fort-en-maths\/\">Comment \u00eatre fort en maths ?<\/a><\/p>\n\n        <\/div>\n    <\/section>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quelques-exercices-juste-pour-toi\">Quelques exercices juste pour toi !<\/h2>\n\n\n\n<p>Maintenant qu\u2019on a vu ensemble ces 5 calculs indispensables, c\u2019est<strong> \u00e0 toi de les mettre en pratique<\/strong> ! Chauffe-toi avec ces petits exercices. Et si tu en as besoin, <strong>n\u2019h\u00e9site pas \u00e0 revenir sur le cours<\/strong>.&nbsp;<\/p>\n\n\n\n<p>\ud83d\udc49 Pour chaque exercice, donne la formule qui correspond aux crit\u00e8res de l&rsquo;\u00e9nonc\u00e9 et calcule l\u2019aire.&nbsp;<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pr\u00e8s de chez Martin, il y a un terrain de tennis. Ce terrain fait 9 m de largeur et 28 m de longueur. Calcule l\u2019aire du terrain !&nbsp;<\/li>\n\n\n\n<li>Pour rester sur le th\u00e8me du tennis. Martin a ramass\u00e9 une balle, il sait que son rayon est de 6,50 cm. De combien est son aire ?&nbsp;Tu as un carr\u00e9 dont un c\u00f4t\u00e9 fait 12,6 cm de longueur. Peux-tu d\u00e9duire la surface de ce carr\u00e9 ?&nbsp;<\/li>\n\n\n\n<li>Devant toi se dresse une pyramide \u00e0 base carr\u00e9e. Les c\u00f4t\u00e9s de sa base sont de 250 m. Ses faces lat\u00e9rales sont des triangles quelconques de 440 m de longueur. Sa hauteur est de 380 m. Quel est son aire ?&nbsp;<\/li>\n\n\n\n<li>Pour finir sur une note gourmande. Voici un nacho de 40 mm. Sa hauteur est de 32 mm. Quelle est l\u2019aire d\u2019un nacho ?&nbsp;<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"reponses\">R\u00e9ponses !&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li> Un terrain de tennis est rectangulaire. A = L\u00d7 l&nbsp;<\/li>\n<\/ul>\n\n\n\n<p>A = 9 \u00d7 28&nbsp;<\/p>\n\n\n\n<p>A = 252&nbsp;<\/p>\n\n\n\n<p><em>\ud83d\udc49 L\u2019aire du terrain de tennis est de 252 m\u00b2.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Une balle de tennis est vide, il s\u2019agit donc d\u2019une sph\u00e8re. A = 4 x \u03c0 x R\u00b2<\/li>\n<\/ul>\n\n\n\n<p>A = 4 x \u03c0 x 6,50\u00b2<\/p>\n\n\n\n<p>A = 4 \u00d7 3,14 x (6,50 \u00d7 6,50)<\/p>\n\n\n\n<p>A = 12,56 \u00d7 42,25<\/p>\n\n\n\n<p>A = 530,66&nbsp;<\/p>\n\n\n\n<p><em>\ud83d\udc49 L\u2019aire de la balle de tennis est de 530,66 cm\u00b2.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tous les c\u00f4t\u00e9s d\u2019un carr\u00e9 sont \u00e9gaux. A = C x C<\/li>\n<\/ul>\n\n\n\n<p>A = 12,6 \u00d7 12,6<\/p>\n\n\n\n<p>A = 158,76<\/p>\n\n\n\n<p><em>\ud83d\udc49 Le carr\u00e9 fait 158,76 cm\u00b2 de surface.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<table id=\"tablepress-1199\" class=\"tablepress tablepress-id-1199\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Aire de la base <\/th><th class=\"column-2\">Aire des faces lat\u00e9rales<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">A = C x C <\/td><td class=\"column-2\">A = b \u00d7 h \u00f7 2<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">A = 250 \u00d7 250<br \/>\nA = 6 250 m\u00b2<\/td><td class=\"column-2\">A = 440 \u00d7 380 \u00f7 2 <br \/>\nA = 83 600 m\u00b2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n<p>A d\u2019une pyramide = A de la base + A des faces lat\u00e9rales<\/p>\n\n\n\n<p>A = 6 250 + 83 600&nbsp;<\/p>\n\n\n\n<p>A = 89 850 m\u00b2<\/p>\n\n\n\n<p><em>\ud83d\udc49 L\u2019aire de la pyramide est de 89 850 m\u00b2.&nbsp;<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Un nacho est un triangle \u00e9quilat\u00e9ral. Ses trois c\u00f4t\u00e9s ont alors la m\u00eame valeur.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p>A = b x h \u00f7 2<\/p>\n\n\n\n<p>A = 40 \u00d7 32 \u00f7 2<\/p>\n\n\n\n<p>A = 640 mm\u00b2<\/p>\n\n\n\n<p><em>\ud83d\udc49 L\u2019aire du nacho est de 640 mm\u00b2.&nbsp;<\/em><\/p>\n\n\n\n<p>Apr\u00e8s tant d&rsquo;efforts, on esp\u00e8re que ce petit cours de maths t\u2019aura aid\u00e9 \u00e0 mieux comprendre <em>Comment calculer une aire<\/em> ! Avec les 5 formules qu\u2019on t\u2019a donn\u00e9es, tu as toutes tes chances pour r\u00e9ussir tes \u00e9valuations.&nbsp;\ud83d\ude09<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-center kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;center&quot;,&quot;id&quot;:&quot;249286&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;14&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;3.6&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Tu as aim\u00e9 cet article ?&quot;,&quot;legend&quot;:&quot;3.6\\\/5 - (14 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Comment calculer une aire ? - 6\u1d49 \ud83e\udd28&quot;,&quot;width&quot;:&quot;101.9&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 101.9px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            3.6\/5 - (14 votes)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Parmi toutes les mati\u00e8res enseign\u00e9es au coll\u00e8ge, les math\u00e9matiques font partie des moins appr\u00e9ci\u00e9es. Chez les Sherpas, on (&#8230;)<\/p>\n","protected":false},"author":326,"featured_media":249343,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"category":[803,810],"tag":[77,770,771],"class_list":["post-249286","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apprendre-matiere","category-maths","tag-college","tag-fiche-revision","tag-geometrie"],"acf":[],"_links":{"self":[{"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/posts\/249286","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/users\/326"}],"replies":[{"embeddable":true,"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/comments?post=249286"}],"version-history":[{"count":0,"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/posts\/249286\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/media\/249343"}],"wp:attachment":[{"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/media?parent=249286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/category?post=249286"},{"taxonomy":"tag","embeddable":true,"href":"https:\/\/sherpas.com\/blog\/wp-json\/wp\/v2\/tag?post=249286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}