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[几何] 有关内心、内接圆

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hbghlyj Posted 2019-1-14 00:11 |Read mode

Last edited by hbghlyj 2024-12-13 17:00I为内心，AH为高，AI交BC于E，交外接圆于M，F在直线BC上，FM⊥AM，MH再次交外接圆于D，求证：∠IDE=∠IFM

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Author| hbghlyj Posted 2024-12-14 01:36

如何证明？

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