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[几何] 旁心和两个顶点形成的三角形的Euler线共点

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hbghlyj posted 2024-3-31 23:11 |Read mode
A Theorem on Concurrent Euler Lines, C. J. Bradley
Screenshot 2024-03-31 161029.png $I_1, I_2 ,I_3$是$\triangle ABC$的旁心,则$\triangle I_1 B C, I_2 C A ,I_3AB$的Euler线共点。

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