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标题: 问问 [打印本页]

作者: lena110220 时间: 2008-4-28 16:15
标题: 问问

is the measure of one of the interior angles of quadrilater 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

正确答案是E

但我想选D

作者: 林林总总 时间: 2008-4-28 16:28

选E，因为不知道哪两个角是直角。四个角的度数可能为90,90,45,135,或者为90,90,60,120

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