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等边三角形命题的逆命题

2009-05-23 22:56:29| 分类：有难度的几何题 | 标签： |举报 |字号大中小订阅

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下面的这个问题若将已知和条件互换，则是初中课本中的一个常见的基础题，然而这个题的逆命题却颇有难度。目前只找到了反证法的证明。

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