.A120的知识精选

等腰梯形的两底之差等于腰长,则腰与下底的夹角为(   ).(A)120°                   ...
问题详情:等腰梯形的两底之差等于腰长,则腰与下底的夹角为(   ).(A)120°                              (B)60°(C)45°                             ...
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