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[几何] 与内心有关的一道小题

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aishuxue Posted 2024-10-6 20:07 |Read mode
Last edited by hbghlyj 2025-4-7 17:28I为△ABC的内心,直线BI分别交AC及△ABC的外接圆于E,M 直线CI分别交AB及△ABC的外接圆于F,N, 求证:PA与△ABC的外接圆相切。

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2025-6-6 14:41 GMT+8

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