# Vector problem

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• September 1st 2012, 08:32 AM
mathmagix
Vector problem
I tryed to solve an apearently simple geometry problem but i could not. Someone please help me!(excuse my english)
In the interior of an equilateral triangle (whose center is O) we consider a point P and let P1, P2, P3 be the orthogonal projection of the point P on the three sides of the triangle. prove that $\vec{PP_1}+\vec{PP_2}+\vec{PP_3}=\frac{3}{2}\vec{P O}$
• September 28th 2012, 08:26 AM
johnsomeone
Re: Vector problem
Google: Viviani's Theorem