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一道经典几何题条件与结论的互换变式

2016-06-22 20:51:35| 分类：数学趣题 | 标签： |举报 |字号大中小订阅

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下面所呈现的经典截长补短类几何题有三个条件、一个结论。如果将某一个条件和结论互换，那么所得到三个变式题的难度较原题有较大的提升，但颇有趣味。

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