麻煩幫幫手呀~~~
1.計算圖形面積及周界
(按下面網址看圖)
http://hk.geocities.com/hk_kitty2001/002.jpg
2.計算圖形面積及周界
(按下面網址看圖)
http://hk.geocities.com/hk_kitty2001/001.jpg
「數學」- 圖形面積及周界
2008-05-17 6:07 pm
回答 (2)
2008-05-17 6:57 pm
✔ 最佳答案
1) 周界= 4+7+10+2
= 23 (cm)
面積
= (4 x 7) + [2 x (10-4)]
= 28 + 12
= 40 cm^2
2) 周界
= (8 x 2 x 3.14)/2 + [8 + 8 + (2 x 8)]
= 25.12 + 32
= 57.12 (cm)
面積
= (8^2 x 3.14)/2 + (8 x 8 x 2)
= 100.48 + 32
= 132.48 (cm^2)
2008-05-17 6:16 pm
[4x(7-2)]x(10x2)
=[4x5]x20
=20x20
=400cm2
=[4x5]x20
=20x20
=400cm2
收錄日期: 2021-04-25 13:36:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080517000051KK00614