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2AF=AB = BD=DE=AE Column A Column B The sum of the area of triangular region ABF
2AF=AB = BD=DE=AE Column A Column B The sum of the area of triangular region ABF
admin
2009-05-19
50
问题
2AF=AB = BD=DE=AE
Column A Column B
The sum of the area of triangular region ABF The area of rectangular region BCEF
and the area of triangular region CDE
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
D
解析
本题的正确答案为(D)。考生在做该题时要借助图形来解。根据题中所给出的已知条件,可知A,B,D,E四点可构成一个菱形,而B,C,F,E四点则构成一个长方形。左项为△ABF与△CDE面积之和,右项为长方形BCEF的面积。则存在两个三角形和一个长方形,且两三角形的一边为长方形的一边,由此考生可以通过以上已知条件画出下面两个图形,它们都完全满足2AF=AB=BD=DE=AE。
在上面的左边的图形中,△ABF与△CDE面积之和等于长方形BCEF面积;而在右边的图形中△ABF与△CDE的面积之和很显然不等于长方形BCEF的面积,中间多了一个四边形AEDB,所以本题为无法判断。
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