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Wednesday, August 21, 2019

2010 JBMO Shortlist G1


Consider a triangle {ABC} with{\angle ACB=90^{\circ}.} Let {F} be the foot of the altitude from {C}. Circle {\omega} touches the line segment {FB}at point {P,}  the altitude {CF}at point {Q} and the circumcircle of {ABC}at point {R.} Prove that points {A,Q,R} are collinear and {AP=AC}.



posted in aops here
my solution
 



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