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[几何] 与内心有关的一道小题

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aishuxue Posted at 2024-10-6 20:07:42 |Read mode
Last edited by hbghlyj at 2025-4-7 17:28:27I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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2025-4-20 22:04 GMT+8

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