{"id":1118,"date":"2026-05-05T06:17:53","date_gmt":"2026-05-05T06:17:53","guid":{"rendered":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/tong-hop-de-hsg-toan-9\/"},"modified":"2026-05-05T07:59:22","modified_gmt":"2026-05-05T07:59:22","slug":"tong-hop-de-hsg-toan-9","status":"publish","type":"post","link":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/tong-hop-de-hsg-toan-9\/","title":{"rendered":"T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9 Ch\u01b0\u01a1ng Tr\u00ecnh M\u1edbi C\u00f3 \u0110\u00e1p \u00c1n"},"content":{"rendered":"<p>B\u1ea1n \u0111ang t\u00ecm ki\u1ebfm m\u1ed9t kho t\u00e0ng \u0111\u1ec1 thi ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn k\u1ef9 l\u01b0\u1ee1ng \u0111\u1ec3 b\u1ee9t ph\u00e1 gi\u1edbi h\u1ea1n trong c\u00e1c k\u1ef3 thi HSG to\u00e1n 9? <strong>T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9<\/strong> l\u00e0 gi\u1ea3i ph\u00e1p to\u00e0n di\u1ec7n, \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n t\u1eeb c\u00e1c k\u1ef3 thi ch\u1ecdn \u0111\u1ed9i tuy\u1ec3n HSG c\u1ea5p huy\u1ec7n, t\u1ec9nh uy t\u00edn nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y. V\u1edbi b\u1ed9 t\u00e0i li\u1ec7u n\u00e0y, b\u1ea1n s\u1ebd n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c m\u1ecdi ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i n\u00e2ng cao v\u00e0 t\u1ef1 tin s\u0103n t\u00ecm \u0111i\u1ec3m 10 trong m\u1ecdi cu\u1ed9c thi. C\u00f9ng <a href=\"https:\/\/tailieuonthi.edu.vn\/\" rel=\"noopener\" target=\"_blank\"><strong>Tailieuonthi<\/strong><\/a> kh\u00e1m ph\u00e1 xem b\u1ed9 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t n\u00e0y nh\u00e9!<\/p>\n<h2><strong>\u0110i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9<\/strong><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng \u01b0u \u0111i\u1ec3m n\u1ed5i tr\u1ed9i gi\u00fap t\u00e0i li\u1ec7u n\u00e0y tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u:<\/p>\n<ul>\n<li><strong>T\u00ednh \u0111a d\u1ea1ng v\u00e0 c\u1eadp nh\u1eadt:<\/strong> B\u1ed9 \u0111\u1ec1 \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p t\u1eeb nhi\u1ec1u t\u1ec9nh th\u00e0nh tr\u00ean c\u1ea3 n\u01b0\u1edbc, \u0111\u1ea3m b\u1ea3o s\u1ef1 phong ph\u00fa v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 c\u00e1c d\u1ea1ng b\u00e0i, \u0111\u1ed3ng th\u1eddi b\u00e1m s\u00e1t xu h\u01b0\u1edbng ra \u0111\u1ec1 c\u1ee7a c\u00e1c n\u0103m h\u1ecdc g\u1ea7n \u0111\u00e2y.<\/li>\n<li><strong>Tr\u1ecdng t\u00e2m ki\u1ebfn th\u1ee9c n\u00e2ng cao:<\/strong> \u0110i s\u00e2u v\u00e0o c\u00e1c chuy\u00ean \u0111\u1ec1 th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong \u0111\u1ec1 HSG c\u1ea5p t\u1ec9nh: Ph\u01b0\u01a1ng tr\u00ecnh, h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh, s\u1ed1 h\u1ecdc, h\u00ecnh h\u1ecdc ph\u1eb3ng (\u0111\u1ecbnh l\u00fd menelaus, ceva) v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c b\u00e0i to\u00e1n b\u1ea5t \u0111\u1eb3ng th\u1ee9c, gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t \u2013 nh\u1ecf nh\u1ea5t (min \u2013 max) \u0111\u00f2i h\u1ecfi k\u1ef9 thu\u1eadt cao.<\/li>\n<li><strong>L\u1eddi gi\u1ea3i si\u00eau chi ti\u1ebft:<\/strong> M\u1ed7i \u0111\u1ec1 thi \u0111\u1ec1u c\u00f3 \u0111\u00e1p \u00e1n tr\u00ecnh b\u00e0y t\u1eebng b\u01b0\u1edbc, r\u00f5 r\u00e0ng. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch t\u01b0 duy v\u00e0 c\u00e1ch tr\u00ecnh b\u00e0y b\u00e0i l\u00e0m \u0111\u1ea1t \u0111i\u1ec3m t\u1ed1i \u0111a, tr\u00e1nh l\u1ed7i tr\u00ecnh b\u00e0y l\u00e0m m\u1ea5t \u0111i\u1ec3m.<\/li>\n<\/ul>\n<h2><strong>N\u1ed9i dung T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9<\/strong><\/h2>\n<p>B\u1ed9 t\u00e0i li\u1ec7u n\u00e0y chia th\u00e0nh hai ph\u1ea7n ch\u00ednh: \u0110\u1ec1 b\u00e0i v\u00e0 l\u1eddi gi\u1ea3i. C\u00e1ch s\u1eafp x\u1ebfp khoa h\u1ecdc gi\u00fap b\u1ea1n t\u1ef1 h\u1ecdc hi\u1ec7u qu\u1ea3.<\/p>\n<h3><strong>Ph\u1ea7n \u0111\u1ec1 b\u00e0i<\/strong><\/h3>\n<p>C\u00e1c \u0111\u1ec1 thi \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc k\u1ef9 l\u01b0\u1ee1ng, m\u00f4 ph\u1ecfng \u0111\u00fang c\u1ea5u tr\u00fac v\u00e0 th\u1eddi gian l\u00e0m b\u00e0i th\u1ef1c t\u1ebf c\u1ee7a k\u1ef3 thi HSG (120 ph\u00fat ho\u1eb7c 150 ph\u00fat). C\u00e1c c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp h\u1ee3p l\u00fd, ph\u1ee7 \u0111\u1ec1u c\u00e1c m\u1ea3ng ki\u1ebfn th\u1ee9c kh\u00f3 m\u00e0 h\u1ecdc sinh th\u01b0\u1eddng hay g\u1eb7p.<\/p>\n<ul>\n<li><strong>\u0110\u1ea1i s\u1ed1:<\/strong> T\u1eadp trung v\u00e0o c\u00e1c b\u00e0i to\u00e1n gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh, h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc cao, c\u00e1c b\u00e0i to\u00e1n v\u1ec1 s\u1ed1 h\u1ecdc (chia h\u1ebft, s\u1ed1 ch\u00ednh ph\u01b0\u01a1ng).<\/li>\n<li><strong>H\u00ecnh h\u1ecdc:<\/strong> C\u00e1c b\u00e0i to\u00e1n v\u1ec1 ch\u1ee9ng minh, t\u00ednh to\u00e1n li\u00ean quan \u0111\u1ebfn \u0111\u01b0\u1eddng tr\u00f2n, tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng, h\u1ec7 th\u1ee9c l\u01b0\u1ee3ng, c\u00e1c b\u00e0i to\u00e1n t\u00ecm c\u1ef1c tr\u1ecb h\u00ecnh h\u1ecdc.<\/li>\n<li><strong>T\u1ed5 h\u1ee3p:<\/strong> C\u00e1c b\u00e0i to\u00e1n logic, \u0111\u1ebfm, ho\u1eb7c ch\u1ee9ng minh t\u1ed3n t\u1ea1i.<\/li>\n<\/ul>\n<p>B\u1ed9 t\u00e0i li\u1ec7u t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi c\u1ee7a nhi\u1ec1u tr\u01b0\u1eddng n\u1ed5i ti\u1ebfng v\u00e0 v\u1eabn \u0111ang ti\u1ebfp t\u1ee5c c\u1eadp nh\u1eadt th\u00eam nhi\u1ec1u m\u00e3 \u0111\u1ec1 c\u1ee7a nhi\u1ec1u tr\u01b0\u1eddng kh\u00e1c:<\/p>\n<ul>\n<li>\u0110\u1ec1 s\u1ed1 01: \u0110\u00d4NG L\u1ed8C \u2013 NGH\u1ec6 AN<\/li>\n<li>\u0110\u1ec1 s\u1ed1 02: GI\u1ea2I L\u1ea0C \u2013 NGH\u1ec6 AN<\/li>\n<li>\u0110\u1ec1 s\u1ed1 03: QU\u1ea2NG B\u00ccNH \u2013 THANH H\u00d3A<\/li>\n<li>\u0110\u1ec1 s\u1ed1 04: Y\u00caN TH\u00c0NH \u2013 NGH\u1ec6 AN<\/li>\n<li>\u0110\u1ec1 s\u1ed1 05: M\u00c3 TH\u00c0NH \u2013 NGH\u1ec6 AN<\/li>\n<li>\u0110\u1ec1 s\u1ed1 06: H\u1eacU TH\u00c0NH \u2013 NGH\u1ec6 AN<\/li>\n<li>\u0110\u1ec1 s\u1ed1 07: H\u1ea2I CH\u00c2U<\/li>\n<li>\u0110\u1ec1 s\u1ed1 08: NGUY\u1ec4N TR\u00c3I<\/li>\n<li>\u0110\u1ec1 s\u1ed1 09: NAM T\u1eea LI\u00caM \u2013 H\u00c0 N\u1ed8I<\/li>\n<li>\u0110\u1ec1 s\u1ed1 10: C\u1ea6U GI\u1ea4Y \u2013 Y\u00caN H\u00d2A \u2013 H\u00c0 N\u1ed8I<\/li>\n<li>\u0110\u1ec1 s\u1ed1 11: \u0110\u1ec1 thi HSG l\u1edbp 9 Ng\u00f4 S\u0129 Li\u00ea<\/li>\n<li>\u0110\u1ec1 s\u1ed1 12: UBND X\u00c3 PH\u00daC TH\u1ecc \u0110\u1ec1 thi HSG 9<\/li>\n<li>\u0110\u1ec1 s\u1ed1 13: THCS C\u1ea7u Gi\u1ea5y \u0110\u1ec1 thi HSG 9<\/li>\n<li>\u0110\u1ec1 s\u1ed1 14: Ph\u01b0\u1eddng T\u00e2n Mai \u0110\u1ec1 thi HSG to\u00e1n 9<\/li>\n<li>\u0110\u1ec1 s\u1ed1 15: UBND X\u00c3 DI\u1ec4N CH\u00c2U \u0110\u1ec1 thi HSG 9<\/li>\n<li>\u0110\u1ec1 s\u1ed1 16: B\u00e1 Th\u01b0\u1edbc \u0110\u1ec1 thi HSG<\/li>\n<li>(Ti\u1ebfp t\u1ee5c c\u1eadp nh\u1eadt)<\/li>\n<\/ul>\n<h3><strong>Ph\u1ea7n \u0111\u00e1p \u00e1n<\/strong><\/h3>\n<p><a href=\"https:\/\/tailieuonthi.edu.vn\/lop-9\/toan-9\/\" rel=\"noopener\" target=\"_blank\"><strong>T\u00e0i li\u1ec7u to\u00e1n 9<\/strong><\/a> \u0111i k\u00e8m \u0111\u00e1p \u00e1n chi ti\u1ebft cho t\u1eebng \u0111\u1ec1, bao g\u1ed3m:<\/p>\n<ul>\n<li>L\u1eddi gi\u1ea3i t\u1eebng b\u01b0\u1edbc, ph\u00e2n t\u00edch c\u00e1ch l\u00e0m v\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u01b0 duy.<\/li>\n<li>B\u1ea3ng t\u1ed5ng h\u1ee3p gi\u00e1 tr\u1ecb, ph\u00e2n t\u00edch tr\u01b0\u1eddng h\u1ee3p, minh h\u1ecda b\u1eb1ng h\u00ecnh v\u1ebd.<\/li>\n<li>Gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng c\u00e1c b\u01b0\u1edbc bi\u1ebfn \u0111\u1ed5i, tr\u00e1nh h\u1ecdc sinh h\u1ecdc \u201cv\u1eb9t\u201d c\u00f4ng th\u1ee9c.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" alt=\"\" class=\"aligncenter size-full wp-image-6212\" decoding=\"async\" height=\"1131\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-3.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-3.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-3-212x300.jpg 212w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-3-724x1024.jpg 724w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-3-768x1086.jpg 768w\" width=\"800\"\/> <img loading=\"lazy\" alt=\"\" class=\"aligncenter size-full wp-image-6213\" decoding=\"async\" height=\"1131\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-2.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-2.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-2-212x300.jpg 212w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-2-724x1024.jpg 724w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-2-768x1086.jpg 768w\" width=\"800\"\/> <img alt=\"\" class=\"aligncenter size-full wp-image-6214\" decoding=\"async\" height=\"1131\" loading=\"lazy\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-1.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-1.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-1-212x300.jpg 212w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-1-724x1024.jpg 724w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/tong-hop-de-hsg-toan-9-1-768x1086.jpg 768w\" width=\"800\"\/><\/p>\n<h2><strong>T\u1ea3i T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9<\/strong><\/h2>\n<p>N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm m\u1ed9t b\u1ed9 t\u00e0i li\u1ec7u luy\u1ec7n thi h\u1ecdc sinh gi\u1ecfi to\u00e1n 9 v\u1eeba th\u1ef1c t\u1ebf, v\u1eeba b\u00e0i b\u1ea3n, th\u00ec \u0111\u00e2y ch\u00ednh l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00e1ng tin c\u1eady. V\u1edbi h\u1ec7 th\u1ed1ng \u0111\u1ec1 thi \u0111a d\u1ea1ng, l\u1eddi gi\u1ea3i chi ti\u1ebft v\u00e0 c\u1ea5u tr\u00fac r\u00f5 r\u00e0ng, b\u1ea1n s\u1ebd c\u00f3 trong tay c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 \u0111\u1ea1t th\u00e0nh t\u00edch cao trong k\u1ef3 thi s\u1eafp t\u1edbi.<\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/drive\/folders\/17HZAIMCY37mVGWKwy2aS-c4OI_EOEZDg\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ea3i T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9 n\u0103m 2025 \u2013 2026 c\u00f3 \u0111\u00e1p \u00e1n mi\u1ec5n ph\u00ed<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n \u0111ang t\u00ecm ki\u1ebfm m\u1ed9t kho t\u00e0ng \u0111\u1ec1 thi ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u01b0\u1ee3c tuy\u1ec3n ch\u1ecdn k\u1ef9 l\u01b0\u1ee1ng \u0111\u1ec3 b\u1ee9t ph\u00e1 gi\u1edbi h\u1ea1n trong c\u00e1c k\u1ef3 thi HSG to\u00e1n 9? T\u1ed5ng h\u1ee3p \u0110\u1ec1 HSG To\u00e1n 9 l\u00e0 gi\u1ea3i ph\u00e1p to\u00e0n di\u1ec7n, \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n t\u1eeb c\u00e1c k\u1ef3 thi ch\u1ecdn \u0111\u1ed9i tuy\u1ec3n HSG c\u1ea5p huy\u1ec7n, t\u1ec9nh uy t\u00edn [&#8230;]\n","protected":false},"author":1,"featured_media":2316,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113],"tags":[114],"class_list":["post-1118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-toan-9","tag-toan-9"],"_links":{"self":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1118","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=1118"}],"version-history":[{"count":1,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1118\/revisions"}],"predecessor-version":[{"id":2317,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1118\/revisions\/2317"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media\/2316"}],"wp:attachment":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media?parent=1118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/categories?post=1118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/tags?post=1118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}