菱形面積除左:
(d denotes diagonal,s denotes side,A denotes the included angle)
(d1+d2)/2
s^2sinA
s^2都可以嗎?
(菱形只不過係square扭"咩"?)
[數學]菱形面積
2007-04-01 3:02 am
回答 (1)
2007-04-01 4:44 am
✔ 最佳答案
Area of a rhombus ≡ s2 sin A ≡ (d1 x d2)/2Note that it should be (d1 x d2)/2, not (d1 + d2)/2 as you wrote above.
Generally, s2 is not correct, except (and, only except) the case that the rhombus is a square (i.e. when A = π/2).
收錄日期: 2021-04-12 01:38:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070331000051KK03855