[几何] 一个关于旁心的问题

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hbghlyj posted 2020-4-16 09:12 |Read mode

△ABC中，$I_1$为旁心，以DE为直径的$\odot$M交$\odot$ABC于PQ，FH⊥ED，求证: MH平分∠PHQ
由于PM=QM，我们实际上要证HPQM共圆

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2025-6-8 05:29 GMT+8

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