{"id":1148,"date":"2026-05-05T06:19:29","date_gmt":"2026-05-05T06:19:29","guid":{"rendered":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/bo-de-thi-giua-ki-2-toan-8\/"},"modified":"2026-05-05T08:01:03","modified_gmt":"2026-05-05T08:01:03","slug":"bo-de-thi-giua-ki-2-toan-8","status":"publish","type":"post","link":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/bo-de-thi-giua-ki-2-toan-8\/","title":{"rendered":"B\u1ed9 \u0110\u1ec1 Thi Gi\u1eefa K\u00ec 2 To\u00e1n 8 Ch\u01b0\u01a1ng Tr\u00ecnh M\u1edbi C\u00f3 \u0110\u00e1p \u00c1n"},"content":{"rendered":"<p>Giai \u0111o\u1ea1n gi\u1eefa h\u1ecdc k\u1ef3 2 l\u1edbp 8 \u0111ang \u0111\u1ebfn g\u1ea7n, \u0111\u00e2y l\u00e0 l\u00fac b\u1ea1n c\u1ea7n t\u1eadp trung \u00f4n t\u1eadp c\u00e1c ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m nh\u01b0 ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 v\u00e0 tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng. B\u1ea1n \u0111ang c\u1ea7n m\u1ed9t t\u00e0i li\u1ec7u t\u1ed5ng h\u1ee3p, c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec1 thi chu\u1ea9n \u0111\u1ec3 th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3? <strong>B\u1ed9 \u0110\u1ec1 Thi Gi\u1eefa K\u00ec 2 To\u00e1n 8<\/strong> ch\u00ednh l\u00e0 gi\u1ea3i ph\u00e1p luy\u1ec7n \u0111\u1ec1 ho\u00e0n h\u1ea3o, gi\u00fap b\u1ea1n l\u00e0m ch\u1ee7 to\u00e0n b\u1ed9 ki\u1ebfn th\u1ee9c quan tr\u1ecdng v\u00e0 t\u1ef1 tin \u0111\u1ea1t \u0111i\u1ec3m cao nh\u1ea5t trong b\u00e0i thi s\u1eafp t\u1edbi. C\u00f9ng <a href=\"https:\/\/tailieuonthi.edu.vn\/\" rel=\"noopener\" target=\"_blank\"><strong>Tailieuonthi EDU<\/strong><\/a> kh\u00e1m ph\u00e1 chi ti\u1ebft b\u1ed9 \u0111\u1ec1 n\u00e0y nh\u00e9!<\/p>\n<h2><strong>L\u00fd do n\u00ean l\u1ef1a ch\u1ecdn B\u1ed9 \u0110\u1ec1 Thi Gi\u1eefa K\u00ec 2 To\u00e1n 8<\/strong><\/h2>\n<p>B\u1ed9 \u0111\u1ec1 thi n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao v\u00e0 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean c\u1ee7a nhi\u1ec1u gi\u00e1o vi\u00ean, h\u1ecdc sinh b\u1edfi nh\u1eefng gi\u00e1 tr\u1ecb \u1ee9ng d\u1ee5ng v\u00e0 t\u00ednh khoa h\u1ecdc v\u01b0\u1ee3t tr\u1ed9i, gi\u00fap t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh \u00f4n t\u1eadp:<\/p>\n<ul>\n<li><strong>B\u00e1m s\u00e1t 100% ma tr\u1eadn \u0111\u1ec1 thi KNTT:<\/strong> T\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng theo \u0111\u00fang ma tr\u1eadn \u0111\u1ec1 ki\u1ec3m tra gi\u1eefa k\u1ef3 2 m\u1edbi nh\u1ea5t c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n 8 K\u1ebft N\u1ed1i Tri Th\u1ee9c, \u0111\u1ea3m b\u1ea3o ph\u1ee7 s\u00f3ng v\u00e0 ph\u00e2n b\u1ed5 t\u1ec9 l\u1ec7 \u0111i\u1ec3m chu\u1ea9n x\u00e1c cho 3 chuy\u00ean \u0111\u1ec1 ch\u00ednh: ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 (35%), ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc nh\u1ea5t (30%), v\u00e0 tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng (35%).<\/li>\n<li><strong>R\u00e8n luy\u1ec7n to\u00e0n di\u1ec7n 4 c\u1ea5p \u0111\u1ed9 t\u01b0 duy:<\/strong> C\u00e1c b\u00e0i t\u1eadp \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 r\u00f5 r\u00e0ng theo 4 m\u1ee9c \u0111\u1ed9 (nh\u1eadn bi\u1ebft, th\u00f4ng hi\u1ec3u, v\u1eadn d\u1ee5ng, v\u1eadn d\u1ee5ng cao), gi\u00fap h\u1ecdc sinh x\u00e2y d\u1ef1ng l\u1ed9 tr\u00ecnh \u00f4n t\u1eadp t\u1eeb n\u1ec1n t\u1ea3ng \u0111\u1ebfn chinh ph\u1ee5c c\u00e1c c\u00e2u h\u1ecfi t\u01b0 duy n\u00e2ng cao.<\/li>\n<li><strong>C\u1ea5u tr\u00fac nh\u01b0 thi th\u1eadt:<\/strong> B\u1ed9 \u0111\u1ec1 cung c\u1ea5p tr\u1ea3i nghi\u1ec7m l\u00e0m b\u00e0i s\u00e1t v\u1edbi \u0111i\u1ec1u ki\u1ec7n thi ch\u00ednh th\u1ee9c, m\u00f4 ph\u1ecfng ho\u00e0n h\u1ea3o format tr\u1eafc nghi\u1ec7m k\u1ebft h\u1ee3p t\u1ef1 lu\u1eadn, gi\u00fap h\u1ecdc sinh l\u00e0m quen v\u1edbi \u00e1p l\u1ef1c th\u1eddi gian v\u00e0 r\u00e8n luy\u1ec7n t\u00e2m l\u00fd ph\u00f2ng thi m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/li>\n<\/ul>\n<h2><strong>N\u1ed9i dung B\u1ed9 \u0110\u1ec1 Thi Gi\u1eefa K\u00ec 2 To\u00e1n 8<\/strong><\/h2>\n<p>B\u1ed9 t\u00e0i li\u1ec7u n\u00e0y t\u1eadp trung v\u00e0o vi\u1ec7c c\u1ee7ng c\u1ed1 v\u00e0 ki\u1ec3m tra ki\u1ebfn th\u1ee9c theo \u0111\u1ecbnh h\u01b0\u1edbng c\u1ee7a s\u00e1ch gi\u00e1o khoa m\u1edbi.<\/p>\n<h3><strong>Ph\u1ea7n \u0111\u1ec1 b\u00e0i<\/strong><\/h3>\n<p>Ph\u1ea7n \u0111\u1ec1 b\u00e0i \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng khoa h\u1ecdc, \u0111\u1ea3m b\u1ea3o bao qu\u00e1t to\u00e0n b\u1ed9 n\u1ed9i dung c\u1ea7n thi\u1ebft trong k\u1ef3 thi Gi\u1eefa H\u1ecdc k\u1ef3 2:<\/p>\n<ul>\n<li><strong>Ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1:<\/strong> T\u1eadp trung v\u00e0o c\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n, \u0111i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh, t\u00ednh ch\u1ea5t, v\u00e0 c\u00e1c ph\u00e9p to\u00e1n c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia ph\u1ee9c t\u1ea1p c\u1ee7a ph\u00e2n th\u1ee9c.<\/li>\n<li><strong>Ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc nh\u1ea5t v\u00e0 h\u00e0m s\u1ed1 b\u1eadc nh\u1ea5t:<\/strong> \u00d4n t\u1eadp c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc nh\u1ea5t m\u1ed9t \u1ea9n v\u00e0 c\u00e1c b\u00e0i to\u00e1n th\u1ef1c t\u1ebf g\u1eafn v\u1edbi ph\u01b0\u01a1ng tr\u00ecnh (v\u00ed d\u1ee5: c\u00e1c b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn chuy\u1ec3n \u0111\u1ed9ng).<\/li>\n<li><strong>Tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng:<\/strong> Chuy\u00ean \u0111\u1ec1 h\u00ecnh h\u1ecdc quan tr\u1ecdng, bao g\u1ed3m c\u00e1c c\u00e2u h\u1ecfi v\u1ec1 \u0111\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng v\u00e0 v\u1eadn d\u1ee5ng \u0111\u1ecbnh l\u00ed Pythagore \u0111\u1ec3 t\u00ednh \u0111\u1ed9 d\u00e0i c\u1ea1nh trong tam gi\u00e1c vu\u00f4ng.<\/li>\n<\/ul>\n<h3><strong>Ph\u1ea7n \u0111\u00e1p \u00e1n<\/strong><\/h3>\n<p>\u0110i\u1ec3m c\u1ed9ng l\u1edbn c\u1ee7a b\u1ed9 t\u00e0i li\u1ec7u n\u00e0y l\u00e0 ph\u1ea7n \u0111\u00e1p \u00e1n chi ti\u1ebft v\u00e0 r\u00f5 r\u00e0ng, gi\u00fap b\u1ea1n t\u1ef1 h\u1ecdc hi\u1ec7u qu\u1ea3 t\u1ea1i nh\u00e0:<\/p>\n<ul>\n<li><strong>B\u1ea3ng t\u1ed5ng h\u1ee3p \u0111\u00e1p \u00e1n nhanh:<\/strong> Cung c\u1ea5p \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c cho 10 c\u00e2u tr\u1eafc nghi\u1ec7m (m\u1ed7i c\u00e2u 0,25 \u0111i\u1ec3m).<\/li>\n<li><strong>L\u1eddi gi\u1ea3i chi ti\u1ebft t\u1eebng b\u01b0\u1edbc:<\/strong> Ph\u1ea7n h\u01b0\u1edbng d\u1eabn gi\u1ea3i c\u00f3 l\u1eddi gi\u1ea3i c\u1ee5 th\u1ec3 cho c\u1ea3 c\u00e2u tr\u1eafc nghi\u1ec7m v\u00e0 b\u00e0i t\u1eadp t\u1ef1 lu\u1eadn. B\u1ea1n s\u1ebd hi\u1ec3u r\u00f5 c\u00e1ch tr\u00ecnh b\u00e0y, ph\u01b0\u01a1ng ph\u00e1p suy lu\u1eadn v\u00e0 c\u00e1ch \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c, tr\u00e1nh t\u00ecnh tr\u1ea1ng h\u1ecdc v\u1eb9t.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" alt=\"\" class=\"aligncenter size-full wp-image-6315\" decoding=\"async\" height=\"566\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-3.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-3.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-3-300x212.jpg 300w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-3-768x543.jpg 768w\" width=\"800\"\/> <img loading=\"lazy\" alt=\"\" class=\"aligncenter size-full wp-image-6316\" decoding=\"async\" height=\"566\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-2.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-2.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-2-300x212.jpg 300w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-2-768x543.jpg 768w\" width=\"800\"\/> <img alt=\"\" class=\"aligncenter size-full wp-image-6317\" decoding=\"async\" height=\"566\" loading=\"lazy\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-1.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-1.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-1-300x212.jpg 300w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/12\/bo-de-thi-giua-ki-2-toan-8-1-768x543.jpg 768w\" width=\"800\"\/><\/p>\n<h2><strong>T\u1ea3i B\u1ed9 \u0110\u1ec1 Thi Gi\u1eefa K\u00ec 2 To\u00e1n 8<\/strong><\/h2>\n<p>\u0110\u1eebng ch\u1ea7n ch\u1eeb, h\u00e3y t\u1ea3i ngay tr\u1ecdn b\u1ed9 <a href=\"https:\/\/tailieuonthi.edu.vn\/lop-8\/toan-8\/\" rel=\"noopener\" target=\"_blank\"><strong>t\u00e0i li\u1ec7u to\u00e1n 8<\/strong><\/a> n\u00e0y v\u1ec1 m\u00e1y \u0111\u1ec3 b\u1eaft \u0111\u1ea7u h\u00e0nh tr\u00ecnh \u00f4n luy\u1ec7n v\u00e0 ch\u1eafc ch\u1eafn \u0111\u1ea1t \u0111i\u1ec3m s\u1ed1 cao trong k\u1ef3 thi s\u1eafp t\u1edbi!<\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/drive\/folders\/1bfqNG4zLhXE4L2PComU_l0AaYoIser7H\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ea3i B\u1ed9 \u0111\u1ec1 ki\u1ec3m tra Gi\u1eefa K\u00ec 2 To\u00e1n 8 2024-2025 (K\u1ebft N\u1ed1i Tri th\u1ee9c)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Giai \u0111o\u1ea1n gi\u1eefa h\u1ecdc k\u1ef3 2 l\u1edbp 8 \u0111ang \u0111\u1ebfn g\u1ea7n, \u0111\u00e2y l\u00e0 l\u00fac b\u1ea1n c\u1ea7n t\u1eadp trung \u00f4n t\u1eadp c\u00e1c ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m nh\u01b0 ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 v\u00e0 tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng. B\u1ea1n \u0111ang c\u1ea7n m\u1ed9t t\u00e0i li\u1ec7u t\u1ed5ng h\u1ee3p, c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec1 thi chu\u1ea9n \u0111\u1ec3 th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3? B\u1ed9 [&#8230;]\n","protected":false},"author":1,"featured_media":2346,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[118],"class_list":["post-1148","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-toan-8","tag-toan-8"],"_links":{"self":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1148","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/comments?post=1148"}],"version-history":[{"count":1,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1148\/revisions"}],"predecessor-version":[{"id":2347,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1148\/revisions\/2347"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media\/2346"}],"wp:attachment":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media?parent=1148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/categories?post=1148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/tags?post=1148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}