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{"id":6288,"date":"2018-01-22T15:56:05","date_gmt":"2018-01-22T08:56:05","guid":{"rendered":"https:\/\/onthitot.com\/?p=6288"},"modified":"2018-12-02T22:36:07","modified_gmt":"2018-12-02T15:36:07","slug":"cong-thuc-tinh-dien-tich-day-dien-tich-xung-quanh-dien-tich-toan-phan-va-the-tich-hinh-non-cut","status":"publish","type":"post","link":"https:\/\/onthitot.com\/cong-thuc-tinh-dien-tich-day-dien-tich-xung-quanh-dien-tich-toan-phan-va-the-tich-hinh-non-cut\/","title":{"rendered":"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n c\u1ee5t – To\u00e1n h\u00ecnh h\u1ecdc l\u1edbp 9."},"content":{"rendered":"

C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n c\u1ee5t.<\/h2>\n

1. C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n.<\/h3>\n
Khi quay m\u1ed9t tam gi\u00e1c vu\u00f4ng g\u00f3c OHA m\u1ed9t v\u00f2ng quanh c\u1ea1nh g\u00f3c vu\u00f4ng OH c\u1ed1 \u0111\u1ecbnh th\u00ec \u0111\u01b0\u1ee3c m\u1ed9t h\u00ecnh n\u00f3n.<\/p>\n
$\"C\u00f4ng$
C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n<\/figcaption><\/figure>\n
– C\u1ea1nh HA t\u1ea1o n\u00ean \u0111\u00e1y c\u1ee7a h\u00ecnh n\u00f3n, l\u00e0 m\u1ed9t h\u00ecnh n\u00f3n t\u00e2m H.<\/p>\n
– C\u1ea1nh OA qu\u00e9t l\u00ean m\u1eb7t xung quanh c\u1ee7a h\u00ecnh n\u00f3n, m\u1ed7i v\u1ecb tr\u00ed c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng sinh, ch\u1eb3ng h\u1ea1n OB l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng sinh .<\/p>\n
– O l\u00e0 \u0111\u1ec9nh v\u00e0 OH l\u00e0 \u0111\u01b0\u1eddng cao c\u1ee7a h\u00ecnh n\u00f3n.<\/p>\n
Ch\u00fang ta c\u00f3 h\u00ecnh n\u00f3n nh\u01b0 h\u00ecnh tr\u00ean c\u00f3 chi\u1ec1u cao h\u1ea1 t\u1eeb \u0111\u00e1y l\u00e0 h, \u0111\u01b0\u1eddng sinh l v\u00e0 b\u00e1n k\u00ednh m\u1eb7t \u0111\u00e1y l\u00e0 r th\u00ec:<\/p>\n
C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y h\u00ecnh n\u00f3n:<\/p>\n
$\"\"$ <\/p>\n
C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch xung quanh h\u00ecnh n\u00f3n:<\/p>\n
$\"\"$ <\/p>\n
C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh n\u00f3n:<\/p>\n
$\"\"$ <\/p>\n
C\u00f4ng th\u1ee9c t\u00ednh th\u1ec3 t\u00edch h\u00ecnh n\u00f3n:<\/p>\n
$\"\"$ 2. C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch xung quanh v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n c\u1ee5t.<\/span><\/p>\n
Khi c\u1eaft h\u00ecnh n\u00f3n b\u1edfi m\u1ed9t m\u1eb7t ph\u1eb3ng song song v\u1edbi \u0111\u00e1y th\u00ec ph\u1ea7n m\u1eb7t ph\u1eb3ng n\u1eb1m trong h\u00ecnh n\u00f3n l\u00e0 m\u1ed9t h\u00ecnh tr\u00f2n. Ph\u1ea7n h\u00ecnh n\u00f3n n\u1eb1m gi\u1eefa m\u1eb7t ph\u1eb3ng n\u00f3i tr\u00ean v\u00e0 m\u1eb7t \u0111\u00e1y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t h\u00ecnh n\u00f3n c\u1ee5t.<\/p>\n
$\"C\u00f4ng$
C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh n\u00f3n c\u1ee5t<\/figcaption><\/figure>\n
Cho h\u00ecnh n\u00f3n c\u1ee5t c\u00f3 r_{1<\/sub>, r_{2<\/sub>\u00a0l\u00e0 c\u00e1c b\u00e1n k\u00ednh \u0111\u00e1y, l l\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng sinh, h l\u00e0 chi\u1ec1u cao.<\/p>\n}}
K\u00ed hi\u1ec7u S_{xq<\/sub>\u00a0l\u00e0 di\u1ec7n t\u00edch xung quanh v\u00e0 V l\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n c\u1ee5t.<\/p>\n}
$\"\"$ <\/p>\n
Theo h\u01b0\u1edbng d\u1eabn c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n \u0111\u1ecdc \u0111\u00e3 c\u00f3 th\u1ec3 hi\u1ec3u h\u01a1n v\u1ec1 c\u00f4ng th\u1ee9c t\u00ednh\u00a0di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n c\u1ee5t.
\nCh\u00fac c\u00e1c b\u1ea1n h\u1ecdc t\u1ed1t!<\/p>\n
<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n c\u1ee5t. 1. C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u00e1y, di\u1ec7n t\u00edch xung quanh,… <\/p>\n","protected":false},"author":1,"featured_media":6471,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[417,443,407],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/6288"}],"collection":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/comments?post=6288"}],"version-history":[{"count":0,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/6288\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media\/6471"}],"wp:attachment":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media?parent=6288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/categories?post=6288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/tags?post=6288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}