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[几何] 三内切圆问题

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hejoseph posted 2017-4-21 09:44 |Read mode
Last edited by hejoseph 2017-4-21 12:20 1.png
三角形内有三个等圆,它们两两外切,且都与三角形一边相切,三角形已知,什么时候圆最大最小?

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游客 posted 2017-4-23 12:52
考虑倒过来做怎么样?

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original poster hejoseph posted 2017-4-24 11:18
什么方法都可以,得到结论就行。

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郝酒 posted 2017-4-27 09:03
不好做,用解析的方法也走不通。
何版有解答吗?

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original poster hejoseph posted 2017-4-28 11:42
1.png
三线共点时最小

2.png
有一边与其中两圆都相切时最大,计算下就行

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isee posted 2017-4-28 18:03
回复 5# hejoseph


    真美的结论

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hbghlyj posted 2021-6-1 15:29
求详细证明

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