MathDB
Problem 3

Source: Macedonian National Olympiad

April 6, 2013
geometryratiocircumcircletrigonometrygeometry proposed

Problem Statement

Acute angle triangle is given such that BC BC is the longest side. Let E E and G G be the intersection points from the altitude from A A to BC BC with the circumscribed circle of triangle ABC ABC and BC BC respectively. Let the center O O of this circle is positioned on the perpendicular line from A A to BE BE . Let EM EM be perpendicular to AC AC and EF EF be perpendicular to AB AB . Prove that the area of FBEG FBEG is greater than the area of MFE MFE .