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[几何] P到正多边形各边的垂线段

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hbghlyj posted 2019-6-6 14:01 |Read mode
Last edited by hbghlyj 2024-9-4 12:14
48109f46731[1].png 48109f46732[1].png
关于"P到正多边形各边的垂线段"有两个定理
  1. 关于投影和(1#kuing 2016)
  2. 关于三角形面积之和(5#kuing 2018)

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kuing posted 2019-6-6 14:04

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kuing posted 2019-6-6 18:42
回复 3# hbghlyj

你是刷不出图还是怎样?那帖 5# 有两个图,第二个图就是证明,麻烦再仔细看看。
我在那里证明了正五边形的情形,并且该证明适用于正 n 边形。

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original poster hbghlyj posted 2024-9-4 17:26
我删除了混乱的旧回复并更新了1#

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