Alexus Gre Solution . What is the angle bisector of ZT PR? Do you see two angles that are marked congruent? We have ZTPS and ZSPR that are congruent. That means that PS is the bisector of ZTPR. . What is mZQ PR? The square in the angle means it is a right angle. We know that the measure of all right angle degrees. . What is mZTPS? Since we know that mZRPQ = 90 degrees then we also know that mZT PR = 90 degree Since segment PS bisects LTPR it cuts the angle in half. Half of 90 = 45 so mZTPS = degrees. . What is mLQ PV? (Hint: Look at the markings that show congruence) degrees