A simple synthetic proof of Lemoine's theorem - Tran Quang Hung

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    A simple synthetic proof of Lemoine's theorem - Tran Quang Hung​

    Using similar triangles and cyclic quadrilaterals, we shall give a simple synthetic proof of the Lemoine's theorem that the symmedian point of a triangle is the unique point which is the centroid of its own pedal triangle.

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    LTTK CTV, 10/10/19
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