MathDB

1

Part of 2003 Japan MO Finals

Problems(1)

find the angle

Source: Japanese MO 2003, problem 1

4/20/2007
A point PP lies in △ABC\triangle ABC. The lines BP,CPBP,CP meet AC,ABAC,AB at Q,RQ,R respectively. Given that AR=RB=CP,CQ=PQAR=RB=CP, CQ=PQ, find ∠BRC\angle BRC.
geometrycircumcircleangle bisectorgeometry unsolved