平面图A=85"B=97"C25"D52"
A同D係相連90度角
D同C係相連
C同B係相連
想問它的面積應該怎計算？
是否所有不等邊四邊形都是一個計法？？
不等邊四邊形面積計法？
2009-03-12 1:15 am
回答 (1)
2009-03-16 5:53 am
✔ 最佳答案
Try Bramhaguta's formula. It will give you the area of a quadrilateral as long as it is not a concave type. area = sqrt{(s-a)(s-b)(s-c)(s-d)}
where s, the semiperimeter, is
s=(a+b+c+d)/2
a, b, c, d are the lengths of four sides of the quadrilateral. For more information:
http://en.wikipedia.org/wiki/Brahmagupta%27s_formula
收錄日期: 2021-05-01 23:52:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090311000051KK00996