The Sum of the Squares of the Distances from the Vertices to the Orthocenter
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Let ABC be a triangle with orthocenter H and let be the circumradius of ABC. Then:
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Contributed by: Jay Warendorff (March 2011)
Open content licensed under CC BY-NC-SA
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See Theorem 204 in N. Altshiller-Court, College Geometry, 2nd ed., Mineola, NY: Dover, 2007 p. 102.
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