{"id":965,"date":"2024-11-26T11:03:04","date_gmt":"2024-11-26T04:03:04","guid":{"rendered":"https:\/\/navi.edu.vn\/blog\/?p=965"},"modified":"2024-11-26T15:18:47","modified_gmt":"2024-11-26T08:18:47","slug":"he-thong-cac-cong-thuc-toan-lop-9-ca-nam-hoc","status":"publish","type":"post","link":"https:\/\/navi.edu.vn\/blog\/he-thong-cac-cong-thuc-toan-lop-9-ca-nam-hoc\/","title":{"rendered":"H\u1ec7 th\u1ed1ng c\u00e1c c\u00f4ng th\u1ee9c To\u00e1n l\u1edbp 9 c\u1ea3 n\u0103m h\u1ecdc"},"content":{"rendered":"

Ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc To\u00e1n l\u1edbp 9 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 chu\u1ea9n b\u1ecb cho k\u1ef3 thi v\u00e0o l\u1edbp 10. Hi\u1ec3u r\u00f5 v\u00e0 s\u1eed d\u1ee5ng th\u00e0nh th\u1ea1o c\u00e1c c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc kh\u00f4ng ch\u1ec9 gi\u00fap h\u1ecdc sinh n\u1eafm ch\u1eafc l\u00fd thuy\u1ebft m\u00e0 c\u00f2n ph\u00e1t tri\u1ec3n k\u1ef9 n\u0103ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1. B\u00e0i vi\u1ebft n\u00e0y t\u1eeb NaviEdu \u0111\u00e3 t\u1ed5ng h\u1ee3p c\u00e1c c\u00f4ng th\u1ee9c to\u00e1n tr\u1ecdng t\u00e2m theo t\u1eebng chuy\u00ean \u0111\u1ec1, gi\u00fap h\u1ecdc sinh d\u1ec5 d\u00e0ng \u00e1p d\u1ee5ng v\u00e0o th\u1ef1c ti\u1ec5n h\u1ecdc t\u1eadp v\u00e0 thi c\u1eed.<\/p>\n

1. V\u00ec sao h\u1ecdc sinh c\u1ea7n n\u1eafm v\u1eefng c\u00e1c c\u00f4ng th\u1ee9c To\u00e1n?<\/h2>\n

C\u00e1c c\u00f4ng th\u1ee9c To\u00e1n h\u1ecdc l\u00e0 n\u1ec1n t\u1ea3ng gi\u00fap h\u1ecdc sinh x\u00e2y d\u1ef1ng t\u01b0 duy v\u00e0 k\u1ef9 n\u0103ng gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n m\u1ed9t c\u00e1ch t\u1ef1 tin, t\u1eeb nh\u1eefng b\u00e0i c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao. N\u1eafm v\u1eefng c\u00f4ng th\u1ee9c ngay t\u1eeb \u0111\u1ea7u kh\u00f4ng ch\u1ec9 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 ti\u1ebfp thu b\u00e0i gi\u1ea3ng m\u00e0 c\u00f2n h\u1ed7 tr\u1ee3 h\u1ecdc sinh hi\u1ec3u s\u00e2u c\u00e1c kh\u00e1i ni\u1ec7m, ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng t\u01b0 duy logic v\u00e0 ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1.<\/p>\n

H\u01a1n n\u1eefa, vi\u1ec7c \u00e1p d\u1ee5ng th\u00e0nh th\u1ea1o c\u00f4ng th\u1ee9c c\u00f2n gi\u00fap h\u1ecdc sinh d\u1ec5 d\u00e0ng chinh ph\u1ee5c c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp kh\u00f3, \u0111\u1ed3ng th\u1eddi t\u1ea1o ti\u1ec1n \u0111\u1ec1 quan tr\u1ecdng \u0111\u1ec3 ti\u1ebfp thu ki\u1ebfn th\u1ee9c m\u1edbi \u1edf l\u1edbp 10. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc \u0111\u1ec7m v\u1eefng ch\u1eafc \u0111\u1ec3 th\u00e0nh c\u00f4ng trong h\u1ecdc t\u1eadp v\u00e0 x\u00e2y d\u1ef1ng s\u1ef1 t\u1ef1 tin cho c\u00e1c ch\u1eb7ng \u0111\u01b0\u1eddng h\u1ecdc v\u1ea5n sau n\u00e0y. C\u00e1c c\u00f4ng th\u1ee9c nh\u01b0 ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai, h\u1ec7 th\u1ee9c l\u01b0\u1ee3ng trong tam gi\u00e1c, hay c\u00e1c \u0111\u1ecbnh l\u00fd h\u00ecnh h\u1ecdc kh\u00f4ng ch\u1ec9 ph\u1ee5c v\u1ee5 thi c\u1eed m\u00e0 c\u00f2n l\u00e0 c\u00f4ng c\u1ee5 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf trong cu\u1ed9c s\u1ed1ng v\u00e0 c\u00e1c m\u00f4n khoa h\u1ecdc kh\u00e1c.<\/p>\n

2. C\u00e1c c\u00f4ng th\u1ee9c to\u00e1n tr\u1ecdng t\u00e2m l\u1edbp 9 c\u1ea7n n\u1eafm v\u1eefng<\/h3>\n

C\u00e1c c\u00f4ng th\u1ee9c to\u00e1n l\u1edbp 9 l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 gi\u1ea3i quy\u1ebft b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao, \u0111\u1ed3ng th\u1eddi chu\u1ea9n b\u1ecb cho k\u1ef3 thi v\u00e0o l\u1edbp 10. H\u1ecdc sinh c\u1ea7n ghi nh\u1edb c\u00e1c c\u00f4ng th\u1ee9c quan tr\u1ecdng. \u0110\u1ec3 t\u1ed1i \u01b0u hi\u1ec7u qu\u1ea3 h\u1ecdc t\u1eadp, h\u00e3y s\u1eafp x\u1ebfp c\u00f4ng th\u1ee9c theo ch\u1ee7 \u0111\u1ec1 v\u00e0 \u00f4n luy\u1ec7n th\u01b0\u1eddng xuy\u00ean. NaviEdu cung c\u1ea5p t\u00e0i li\u1ec7u v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc chi ti\u1ebft, gi\u00fap h\u1ecdc sinh h\u1ec7 th\u1ed1ng h\u00f3a ki\u1ebfn th\u1ee9c m\u1ed9t c\u00e1ch khoa h\u1ecdc v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n

\"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\" \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

Ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc To\u00e1n l\u1edbp 9 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 chu\u1ea9n b\u1ecb cho k\u1ef3 thi v\u00e0o l\u1edbp 10. Hi\u1ec3u r\u00f5 v\u00e0 s\u1eed d\u1ee5ng th\u00e0nh th\u1ea1o c\u00e1c c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc kh\u00f4ng ch\u1ec9 gi\u00fap h\u1ecdc sinh n\u1eafm ch\u1eafc l\u00fd thuy\u1ebft m\u00e0 c\u00f2n ph\u00e1t tri\u1ec3n k\u1ef9 n\u0103ng…<\/p>\n","protected":false},"author":2,"featured_media":986,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[6],"tags":[24],"_links":{"self":[{"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/posts\/965"}],"collection":[{"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/comments?post=965"}],"version-history":[{"count":3,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/posts\/965\/revisions"}],"predecessor-version":[{"id":1039,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/posts\/965\/revisions\/1039"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/media\/986"}],"wp:attachment":[{"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/media?parent=965"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/categories?post=965"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/navi.edu.vn\/blog\/wp-json\/wp\/v2\/tags?post=965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}