{"id":1545,"date":"2025-06-12T21:55:27","date_gmt":"2025-06-12T14:55:27","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=1545"},"modified":"2025-06-13T11:04:53","modified_gmt":"2025-06-13T04:04:53","slug":"tu-giac-co-cac-goc-doi-bang-nhau-la-hinh-gi","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/tu-giac-co-cac-goc-doi-bang-nhau-la-hinh-gi\/","title":{"rendered":"T\u1ee9 gi\u00e1c c\u00f3 c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau l\u00e0 h\u00ecnh g\u00ec?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/tu-giac-co-cac-goc-doi-bang-nhau-la-hinh-gi\/#Tu_giac_co_cac_goc_doi_bang_nhau\" >T\u1ee9 gi\u00e1c c\u00f3 c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/tu-giac-co-cac-goc-doi-bang-nhau-la-hinh-gi\/#Cau_hoi_Trong_cac_cau_sau_cau_nao_dung\" >C\u00e2u h\u1ecfi: Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/tu-giac-co-cac-goc-doi-bang-nhau-la-hinh-gi\/#Dap_an\" >\u0110\u00e1p \u00e1n:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/tu-giac-co-cac-goc-doi-bang-nhau-la-hinh-gi\/#Tim_hieu_them_ve_hinh_thoi\" >T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 h\u00ecnh thoi<\/a><\/li><\/ul><\/nav><\/div>\n<p>H\u00ecnh h\u1ecdc l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc, v\u00e0 vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c \u0111\u1ecbnh ngh\u0129a v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a c\u00e1c h\u00ecnh h\u1ecdc ph\u1eb3ng l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. M\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p l\u00e0 x\u00e1c \u0111\u1ecbnh lo\u1ea1i t\u1ee9 gi\u00e1c khi bi\u1ebft c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i \u0111\u00e1p chi ti\u1ebft c\u00e2u h\u1ecfi &#8220;t\u1ee9 gi\u00e1c c\u00f3 c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau l\u00e0 h\u00ecnh g\u00ec?&#8221; v\u00e0 cung c\u1ea5p th\u00eam th\u00f4ng tin li\u00ean quan \u0111\u1ec3 b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tu_giac_co_cac_goc_doi_bang_nhau\"><\/span>T\u1ee9 gi\u00e1c c\u00f3 c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Cau_hoi_Trong_cac_cau_sau_cau_nao_dung\"><\/span>C\u00e2u h\u1ecfi: Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A. T\u1ee9 gi\u00e1c c\u00f3 c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau l\u00e0 h\u00ecnh thoi.<\/p>\n<p>B. T\u1ee9 gi\u00e1c c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c l\u00e0 h\u00ecnh thoi.<\/p>\n<p>C. H\u00ecnh thang c\u00f3 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau l\u00e0 h\u00ecnh thoi.<\/p>\n<p>D. H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c l\u00e0 h\u00ecnh thoi.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dap_an\"><\/span>\u0110\u00e1p \u00e1n:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/strong><\/p>\n<ul>\n<li>\n<p><strong>Gi\u1ea3i th\u00edch \u0111\u00e1p \u00e1n A:<\/strong> T\u1ee9 gi\u00e1c c\u00f3 c\u00e1c c\u1eb7p g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh. H\u00ecnh thoi l\u00e0 m\u1ed9t tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, khi t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh b\u1eb1ng nhau. Do \u0111\u00f3, \u0111\u00e1p \u00e1n A l\u00e0 sai.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3i th\u00edch \u0111\u00e1p \u00e1n B:<\/strong> T\u1ee9 gi\u00e1c c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c ch\u01b0a \u0111\u1ee7 d\u1eef ki\u1ec7n \u0111\u1ec3 kh\u1eb3ng \u0111\u1ecbnh \u0111\u00e2y l\u00e0 h\u00ecnh thoi.  H\u00ecnh thoi y\u00eau c\u1ea7u th\u00eam \u0111i\u1ec1u ki\u1ec7n c\u00e1c c\u1ea1nh b\u1eb1ng nhau ho\u1eb7c hai \u0111\u01b0\u1eddng ch\u00e9o l\u00e0 \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c c\u1ee7a c\u00e1c g\u00f3c. Do \u0111\u00f3, \u0111\u00e1p \u00e1n B l\u00e0 sai.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3i th\u00edch \u0111\u00e1p \u00e1n C:<\/strong> H\u00ecnh thang c\u00f3 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau l\u00e0 h\u00ecnh thang c\u00e2n. H\u00ecnh thoi l\u00e0 m\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh, trong khi h\u00ecnh thang c\u00e2n kh\u00f4ng nh\u1ea5t thi\u1ebft l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh. Do \u0111\u00f3, \u0111\u00e1p \u00e1n C l\u00e0 sai.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3i th\u00edch \u0111\u00e1p \u00e1n D:<\/strong> H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c l\u00e0 h\u00ecnh thoi. \u0110\u00e2y l\u00e0 m\u1ed9t t\u00ednh ch\u1ea5t \u0111\u1eb7c tr\u01b0ng c\u1ee7a h\u00ecnh thoi.  Do \u0111\u00f3, \u0111\u00e1p \u00e1n D l\u00e0 \u0111\u00fang.<\/p>\n<\/li>\n<\/ul>\n<p><strong>V\u1eady ta ch\u1ecdn ph\u01b0\u01a1ng \u00e1n D.<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tim_hieu_them_ve_hinh_thoi\"><\/span>T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 h\u00ecnh thoi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>H\u00ecnh thoi l\u00e0 m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh b\u1eb1ng nhau.  Ngo\u00e0i ra, h\u00ecnh thoi c\u00f2n c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t sau:<\/p>\n<ul>\n<li>Hai \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c v\u1edbi nhau v\u00e0 c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng.<\/li>\n<li>Hai \u0111\u01b0\u1eddng ch\u00e9o l\u00e0 \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c c\u1ee7a c\u00e1c g\u00f3c.<\/li>\n<li>C\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau.<\/li>\n<li>L\u00e0 m\u1ed9t tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh.<\/li>\n<\/ul>\n<p>Vi\u1ec7c ph\u00e2n bi\u1ec7t h\u00ecnh thoi v\u1edbi c\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c kh\u00e1c nh\u01b0 h\u00ecnh b\u00ecnh h\u00e0nh, h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh vu\u00f4ng l\u00e0 r\u1ea5t quan tr\u1ecdng.  Hi\u1ec3u r\u00f5 c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a t\u1eebng lo\u1ea1i h\u00ecnh s\u1ebd gi\u00fap b\u1ea1n gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n h\u00ecnh h\u1ecdc m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u00ecnh h\u1ecdc l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc, v\u00e0 vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c \u0111\u1ecbnh ngh\u0129a v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a c\u00e1c h\u00ecnh h\u1ecdc ph\u1eb3ng l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. M\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p l\u00e0 x\u00e1c \u0111\u1ecbnh lo\u1ea1i t\u1ee9 gi\u00e1c khi bi\u1ebft c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1545","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/1545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=1545"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/1545\/revisions"}],"predecessor-version":[{"id":18491,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/1545\/revisions\/18491"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=1545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=1545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=1545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}