1題數學題`5點
回答 (3)
2009-08-28 3:18 am
✔ 最佳答案
Let width = x, so length = 3x.Perimeter = 2(x + 3x) = 2(4x) = 8x
so 8x = 24
x = 3 cm
So area = 3 cm x 9 cm = 27 cm^2.
2009-08-28 9:02 pm
設 x cm是長方形的闊.
2(3x+x) = 24
6x+2x = 24
x = 3
∵長方形的闊是3 cm.
∴ 長方形的面積是:
3x(x)
= 9(3)
= 27 cm^2
它的面積是27cm^2.
2(3x+x) = 24
6x+2x = 24
x = 3
∵長方形的闊是3 cm.
∴ 長方形的面積是:
3x(x)
= 9(3)
= 27 cm^2
它的面積是27cm^2.
收錄日期: 2021-04-25 22:36:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090827000051KK01986