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[几何] 转载LingLuo的一道平面几何

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hbghlyj posted 2021-1-31 02:13 |Read mode
Let the centroid, symmedian point of $\triangle$ABC be G,K. The midpoint of GK is L. The pedal triangle of G wrt $\triangle$ABC is $\triangle G_aG_bG_c$. The centroid of $\triangle G_aG_bG_c$ is G'. Reflect G about G' to get S. The midpoint of $G_bG_c$ is M. Reflect G' about ML to get N. Show that $\triangle SNL\sim\triangle JGG_a$.

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