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[几何] 三角形内任一点到三边的距离之和为定值证正三角形

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isee posted 2019-7-17 16:32 |Read mode
三角形内任一点到三边的距离之和为定值,则此三角形为正三角形。

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kuing posted 2019-7-17 17:05
任意点不好玩,我来凭直觉提个猜想:
若三角形内存在不共线的三点使之到三边的距离之和为相同的值,则此三角形为正三角形。

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