C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t<\/figcaption><\/figure><\/div>\n\n\n\n\u0110\u1ec3 t\u00ednh ch\u00ednh x\u00e1c nh\u1ea5t th\u00ec tr\u01b0\u1edbc ti\u00ean b\u1ea1n c\u1ea7n \u0111\u1ed5i to\u00e0n b\u1ed9 th\u00f4ng s\u1ed1 c\u00f3 \u0111\u01b0\u1ee3c v\u1ec1 c\u00f9ng 1 \u0111\u01a1n v\u1ecb \u0111o. V\u00ed d\u1ee5 l\u00e0 m, cm, inch ho\u1eb7c feet.<\/p>\n\n\n\n
>>>Xem th\u00eam:<\/strong> C\u00e1ch t\u00ednh m2 x\u00e2y d\u1ef1ng nh\u00e0 \u1edf m\u1edbi nh\u1ea5t v\u00e0 ch\u00ednh x\u00e1c nh\u1ea5t<\/strong><\/em><\/p>\n\n\n\n<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t 4 c\u1ea1nh kh\u00f4ng b\u1eb1ng nhau<\/b><\/span><\/h2>\n\n\n\nB\u00ean c\u1ea1nh nh\u1eefng m\u1ea3nh \u0111\u1ea5t h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh vu\u00f4ng d\u1ec5 d\u00e0ng t\u00ednh th\u00ec s\u1ebd c\u00f3 nh\u1eefng m\u1ea3nh \u0111\u1ea5t b\u1ecb m\u00e9o m\u00f3. Khi \u0111\u00f3 b\u1ea1n c\u00f3 th\u1ec3 c\u1eaft m\u1ea3nh \u0111\u1ea5t th\u00e0nh c\u00e1c h\u00ecnh vu\u00f4ng, tam gi\u00e1c kh\u00e1c nhau ho\u1eb7c l\u00e0m theo c\u00e1ch d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n
<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t h\u00ecnh thang<\/b><\/span><\/h3>\n\n\n\n\u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea3nh \u0111\u1ea5t h\u00ecnh thang th\u00ec s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c sau: Di\u1ec7n t\u00edch h\u00ecnh thang = [(chi\u1ec1u d\u00e0i + chi\u1ec1u r\u1ed9ng) : 2] x chi\u1ec1u cao.<\/p>\n\n\n\n
T\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang<\/figcaption><\/figure><\/div>\n\n\n\nV\u00ed d\u1ee5: m\u1ea3nh \u0111\u1ea5t nh\u00e0 b\u1ea1n c\u00f3 chi\u1ec1u d\u00e0i l\u00e0 25m, chi\u1ec1u r\u1ed9ng 8m v\u00e0 chi\u1ec1u cao l\u00e0 16m th\u00ec di\u1ec7n t\u00edch m\u1ea3nh \u0111\u1ea5t l\u00e0: [(25 + 8) : 2] x 16 = 264m2<\/p>\n\n\n\n
<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb v\u1ea1t g\u00f3c<\/b><\/span><\/h3>\n\n\n\n\u0110\u1ed1i v\u1edbi nh\u1eefng m\u1ea3nh \u0111\u1ea5t b\u1ecb v\u00e1t g\u00f3c th\u00ec c\u00e1c b\u1ea1n s\u1ebd t\u00ednh di\u1ec7n t\u00edch nh\u01b0 sau: Chia m\u1ea3nh \u0111\u1ea5t th\u00e0nh 2 ph\u1ea7n, 1 ph\u1ea7n t\u1ea1o th\u00e0nh h\u00ecnh thang v\u00e0 1 ph\u1ea7n t\u1ea1o th\u00e0nh h\u00ecnh ch\u1eef nh\u1eadt. Khi \u0111\u00f3, b\u1ea1n s\u1ebd t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb v\u00e1t g\u00f3c = di\u1ec7n t\u00edch h\u00ecnh thang + di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt.<\/p>\n\n\n\n
V\u00ed d\u1ee5: di\u1ec7n t\u00edch h\u00ecnh thang l\u00e0 169m v\u00e0 di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 73m. Khi \u0111\u00f3, di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb v\u00e1t g\u00f3c l\u00e0: 169 + 73 = 242m2<\/p>\n\n\n\n
<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb m\u00e9o<\/b><\/span><\/h3>\n\n\n\n\u0110\u1ec3 t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb m\u00e9o th\u00ec b\u1ea1n n\u00ean chia m\u1ea3nh \u0111\u1ea5t th\u00e0nh t\u1eebng h\u00ecnh nh\u1ecf kh\u00e1c nhau nh\u01b0: h\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh tam gi\u00e1c, h\u00ecnh thang,… Sau \u0111\u00f3 di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb m\u00e9o s\u1ebd b\u1eb1ng t\u1ed5ng c\u1ee7a c\u00e1c di\u1ec7n t\u00edch \u0111\u1ea5t nh\u1ecf. Tuy nhi\u00ean, c\u00f3 m\u1ed9t s\u1ed1 m\u1ea3nh \u0111\u1ea5t b\u1ecb m\u00e9o l\u1ec7ch ph\u1ee9c t\u1ea1p th\u00ec b\u1ea1n n\u00ean s\u1eed d\u1ee5ng m\u00e1y \u0111o ho\u1eb7c \u0111\u1ecba ch\u00ednh \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n\n\n\n
\u0110o di\u1ec7n t\u00edch \u0111\u1ea5t b\u1eb1ng m\u00e1y<\/figcaption><\/figure><\/div>\n\n\n\n<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t h\u00ecnh ch\u1eef nh\u1eadt<\/b><\/span><\/h3>\n\n\n\nC\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: chi\u1ec1u d\u00e0i x chi\u1ec1u r\u1ed9ng<\/p>\n\n\n\n
V\u00ed d\u1ee5: M\u1ea3nh \u0111\u1ea5t nh\u00e0 b\u1ea1n c\u00f3 chi\u1ec1u d\u00e0i l\u00e0 39m, chi\u1ec1u r\u1ed9ng l\u00e0 15m. Khi \u0111\u00f3, di\u1ec7n t\u00edch \u0111\u1ea5t nh\u00e0 b\u1ea1n s\u1ebd l\u00e0: 39 x 15 = 585m2.<\/p>\n\n\n\n
<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t trong s\u1ed5 \u0111\u1ecf (\u0111\u1ea5t th\u1ed5 c\u01b0)<\/b><\/span><\/h2>\n\n\n\nN\u1ebfu b\u1ea1n \u0111ang c\u00f3 \u00fd \u0111\u1ecbnh mua \u0111\u1ea5t th\u1ed5 c\u01b0 \u0111\u1ec3 \u1edf th\u00ec c\u1ea7n l\u01b0u \u00fd v\u1ec1 c\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t trong s\u1ed5 \u0111\u1ecf d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n
C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t trong s\u1ed5 \u0111\u1ecf<\/figcaption><\/figure><\/div>\n\n\n\n- \u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea3nh \u0111\u1ea5t vu\u00f4ng th\u00ec c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c c\u00e1ch t\u00ednh \u0111\u01a1n gi\u1ea3n. N\u1ebfu m\u1ea3nh \u0111\u1ea5t m\u00e9o m\u00f3 th\u00ec chia m\u1ea3nh \u0111\u1ea5t th\u00e0nh c\u00e1c h\u00ecnh kh\u00e1c nhau \u0111\u1ec3 ti\u1ebfn h\u00e0nh \u0111o v\u00e0 c\u1ed9ng t\u1ed5ng di\u1ec7n t\u00edch.<\/li>
- \u0110\u1ea5t th\u1ed5 c\u01b0 th\u01b0\u1eddng s\u1ebd b\u1ecb ch\u00eanh l\u1ec7ch gi\u1eefa di\u1ec7n t\u00edch \u0111\u1ea5t th\u1ef1c v\u00e0 tr\u00ean s\u1ed5 \u0111\u1ecf<\/li>
- \u0110\u1ec3 tr\u00e1nh sai s\u1ed1 th\u00ec b\u1ea1n c\u00f3 th\u1ec3 thu\u00ea \u0111\u01a1n v\u1ecb \u0111o ho\u1eb7c \u0111\u1ecba ch\u00ednh \u0111o \u0111\u1ec3 tr\u00e1nh sai s\u1ed1 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/li><\/ul>\n\n\n\n
<\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t tr\u00ean s\u1ed5 \u0111\u1ecf nhanh nh\u1ea5t<\/b><\/span><\/h2>\n\n\n\n\u0110\u1ec3 t\u00ednh di\u1ec7n t\u00edch \u0111\u1ea5t trong s\u1ed5 \u0111\u1ecf nhanh nh\u1ea5t th\u00ec b\u1ea1n th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc sau \u0111\u00e2y:<\/p>\n\n\n\n
<\/span>B\u01b0\u1edbc 1: Ti\u1ebfn h\u00e0nh \u0111o \u0111\u1ea1c \u0111\u1ea5t th\u1ef1c t\u1ebf<\/b><\/span><\/h3>\n\n\n\n\u0110\u1ed1i v\u1edbi nhi\u1ec1u khu v\u1ef1c, di\u1ec7n t\u00edch \u0111\u1ea5t th\u1ef1c t\u1ebf v\u00e0 tr\u00ean s\u1ed5 \u0111\u1ecf s\u1ebd c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch nhau. V\u00ec th\u1ebf, \u0111\u1ec3 t\u00ednh th\u00ec b\u1ea1n n\u00ean \u0111o di\u1ec7n t\u00edch \u0111\u1ea5t th\u1ef1c t\u1ebf tr\u01b0\u1edbc, n\u00ean \u0111o \u0111i \u0111o l\u1ea1i \u00edt nh\u1ea5t 3 l\u1ea7n \u0111\u1ec3 tr\u00e1nh sai s\u1ed1.<\/p>\n\n\n\n