think about the relationship between ABC and AOC
and then prove 2 trangles are SAS
then you should know the 2 adj angles are 90 degrees
thus the lines are perp
Let c be the circumscribed circle of triangle ABC and let P be the point on c where the bisector of angle ABC meets c. Let O be the center of c. Prove that the radius of segment OP meets segment AC at right angles.
Any help with this proof would be greatly appreciated....