Problem 3
Source: Macedonian National Olympiad
April 6, 2013
geometryratiocircumcircletrigonometrygeometry proposed
Problem Statement
Acute angle triangle is given such that is the longest side. Let and be the intersection points from the altitude from to with the circumscribed circle of triangle and respectively. Let the center of this circle is positioned on the perpendicular line from to . Let be perpendicular to and be perpendicular to . Prove that the area of is greater than the area of .