GWD24-31

meckychen · 发表于 2010-1-11 22:04:04

31

Each side of a certain parallelogram has length 6. if the area of the parallelogram is 18. which of the following is the measure of one of its angles?

A. 30’ B. 45’ C. 60’ D. 90’ E.120’

Answer A

How to calculate? Thank you.

meckychen · 发表于 2010-1-12 14:17:55

Can anyone help me?

ryanxie · 发表于 2010-1-12 14:47:40

四边相等的平行四边形就是菱形，其对角线相互垂直；若对角线长度分别为X,Y，则XY/2=18；再用勾股定理结合边长6，即可算出X,Y；那么就可以知道这是一个菱形的角度了。

GWD24-31

所属分类: GMAT考试

正在浏览此版块的会员 ()

浏览过的版块