MathDB
easy exercise

Source: Ireland 2001

July 5, 2009
geometry proposedgeometry

Problem Statement

In an acute-angled triangle ABC ABC, D D is the foot of the altitude from A A, and P P a point on segment AD AD. The lines BP BP and CP CP meet AC AC and AB AB at E E and F F respectively. Prove that AD AD bisects the angle EDF EDF.
Back to ProblemsView on AoPS