OG详解-OG7 数学2 Q14

The correct answer is 153. Since it’s given that PQ​ is parallel toXY​  and angle Y is a right angle, angle ZQP is also a right angle. Angle ZPQ is complementary to angle XZY, which means its measure, in degrees, is 90-63, or 27. Since angle XPQ is supplementary to angle ZPQ, its measure, in degrees, is 180-27, or 153.