试题与答案

边长为2的正方形ABCD在平面α内的射影是EFCD,如果AB与平面α的距离为2,

题型:填空题

题目:

边长为2的正方形ABCD在平面α内的射影是EFCD,如果AB与平面α的距离为
2
,则AC与平面α所成角的大小是______.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D, E

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