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original poster: 渔舟

[几何] 请教一道平几题

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其妙 posted 2015-2-28 23:44
回复  xfstone


    17楼的具体过程, 大虾常来哟。
isee 发表于 2015-2-27 16:02
你都好久没来了,连乌贼这个几何高手都寂寞不来了,

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乌贼 posted 2015-3-11 14:02
与17楼异曲同工,取$ BC、TC $ 中点$ E、F $ ,$\triangle BTA\sim \triangle EFM$,有$ T、M、F、E $四点共圆,得$ TM=\sqrt{TE^2-ME^2} $
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