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[几何] 从顶点到切点的直线与内切圆交点直角求证等角共轭

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hbghlyj posted 2022-3-11 04:26 |Read mode

△ABC的内切圆⊙I切BC于D,连接AD交⊙I于J,K在JD上且DK=AJ,若BJ⊥CJ,证明:I、K关于△JBC等角共轭.

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2025-7-23 12:35 GMT+8

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