{"id":1530,"date":"2016-08-16T23:04:43","date_gmt":"2016-08-16T22:04:43","guid":{"rendered":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/?p=1530"},"modified":"2018-02-17T02:05:53","modified_gmt":"2018-02-17T01:05:53","slug":"differents-types-de-nombres","status":"publish","type":"post","link":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/differents-types-de-nombres\/","title":{"rendered":"Diff\u00e9rents types de nombres"},"content":{"rendered":"<p><em>Historiquement, les nombres ont servi \u00e0 compter puis \u00e0 mesurer. Mesurer a conduit les hommes \u00e0 \u00e9laborer au fil du temps diff\u00e9rents types de nombres : entiers, rationnels, d\u00e9cimaux\u2026 <\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1529 alignright\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-content\/uploads\/sites\/3\/2016\/08\/nombres_geometrie-286x300.png\" alt=\"nombres_geometrie\" width=\"286\" height=\"300\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-content\/uploads\/sites\/3\/2016\/08\/nombres_geometrie-286x300.png 286w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-content\/uploads\/sites\/3\/2016\/08\/nombres_geometrie.png 526w\" sizes=\"auto, (max-width: 286px) 100vw, 286px\" \/><\/p>\n<p>Rep\u00e9rer les diff\u00e9rents types de nombres rencontr\u00e9s au fur et \u00e0 mesure des questions de cette activit\u00e9 :<\/p>\n<p>&nbsp;<\/p>\n<p>On consid\u00e8re la figure ci-contre ; l\u2019unit\u00e9 de mesure est le centim\u00e8tre.<\/p>\n<p>Le triangle OBE est rectangle en O.<\/p>\n<p>Les points O, F et B sont align\u00e9s, ainsi que les points O, D, A et E.<\/p>\n<p>La droite (DF) est parall\u00e8le \u00e0 la droite (AB).<\/p>\n<p>H est le pied de la hauteur issue de O dans le triangle OAB.<\/p>\n<p>On donne : OA = 6 ; OB = OE = 8\u00a0 et\u00a0 OD = 4.<\/p>\n<p>&nbsp;<\/p>\n<ol>\n<li>R\u00e9aliser la figure en vraie grandeur.<\/li>\n<li>Calculer la valeur exacte de AB.<\/li>\n<li>Calculer les valeurs exactes de OF et de DF.\n<ol>\n<li>Calculer l\u2019aire du triangle OAB.<\/li>\n<li>Exprimer cette aire en fonction de OH ; en d\u00e9duire que OH = 4,8.<\/li>\n<\/ol>\n<\/li>\n<li>Calculer la valeur exacte de AH.<\/li>\n<li>Calculer les valeurs exactes de BD et de EB.<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-content\/uploads\/sites\/3\/2016\/08\/nombres_geometrie.docx\">Fiche \u00e9l\u00e8ve Diff\u00e9rents types de nombres word<\/a><\/p>\n<p><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-content\/uploads\/sites\/3\/2016\/08\/nombres_geometrie.pdf\">Fiche \u00e9l\u00e8ve Diff\u00e9rents types de nombres pdf<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Historiquement, les nombres ont servi \u00e0 compter puis \u00e0 mesurer. Mesurer a conduit les hommes \u00e0 \u00e9laborer au fil du temps diff\u00e9rents types de nombres : entiers, rationnels, d\u00e9cimaux\u2026 Rep\u00e9rer les diff\u00e9rents types de nombres rencontr\u00e9s au fur et \u00e0 mesure des questions de cette activit\u00e9 : &nbsp; On consid\u00e8re la figure ci-contre ; l\u2019unit\u00e9 &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/differents-types-de-nombres\/\">Lire la suite<\/a><\/p>\n","protected":false},"author":351,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1530","post","type-post","status-publish","format-standard","hentry","category-seconde","nodate","item-wrap"],"_links":{"self":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/posts\/1530","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/users\/351"}],"replies":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/comments?post=1530"}],"version-history":[{"count":1,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/posts\/1530\/revisions"}],"predecessor-version":[{"id":1531,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/posts\/1530\/revisions\/1531"}],"wp:attachment":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/media?parent=1530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/categories?post=1530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/mathematiques\/wp-json\/wp\/v2\/tags?post=1530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}