Difference between revisions of "2003 USAMO Problems/Problem 4"
(New page: == Problem == Let <math>ABC</math> be a triangle. A circle passing through <math>A</math> and <math>B</math> intersects segments <math>AC</math> and <math>BC</math> at <math>D</math> and ...) |
(No difference)
|
Revision as of 17:49, 20 August 2008
Problem
Let be a triangle. A circle passing through and intersects segments and at and , respectively. Lines and intersect at , while lines and intersect at . Prove that if and only if .
Solution
This problem needs a solution. If you have a solution for it, please help us out by adding it.