Point A, inside an acute angle, is reflected on either side of the

Could someone solve this maths problem? The bisectors of angle A,B, C of a quadrilateral ABCP meet each other at point O. Prove that the bisector of angle P will also pass

How to find the interior angles of triangle if only vertices of triangle is given in the form of A (x1,y1), B (x2,y2), and C (x3,y3) by using the short method