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Math Help - Napolean's Theorem

  1. #1
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    Napolean's Theorem

    Prove: The centroids (A centroid is the point where the three medians of a triangle meet) of the equilaterals constructed externally on the sides of any triangle ABC are the vertices of another equilateral triangle.
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  2. #2
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    There's a very nice (interactive) pictorial proof here. A google search for "Napoleon's Theorem" will turn up any number of more formal proofs.
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