MathDB
inequality of altitude

Source: INMO 2009 Problem 5

January 18, 2009
inequalitiesgeometrytrigonometrycircumcirclegeometric transformationreflectionrectangle

Problem Statement

Let ABC ABC be an acute angled triangle and let H H be its ortho centre. Let hmax h_{max} denote the largest altitude of the triangle ABC ABC. Prove that:
AH \plus{} BH \plus{} CH\leq2h_{max}