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标题: gwd 13-13 key is E, but i think B ? [打印本页]

作者: 虚无飘渺 时间: 2006-3-6 07:24 标题: gwd 13-13 key is E, but i think B ?

Q13:

Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees?

(1) Two of the interior angles of ABCD are right angles.

(2) The degree measure of angle ABC is twice the degree measure of angle BCD.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

作者: himba 时间: 2006-3-7 07:18

条件1知道剩下的2个角度和为180.条件2可以知道一个角是60度.假设剩余的2个角一个为x.则x+2x=180---x=60.我选C

作者: duduzhang 时间: 2007-5-14 11:21

我也选C, 是不是答案有问题啊

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