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 ...) |
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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.
