Question

plz help me to solve out this prblm

Answer 1

angle PRQ=angle PCQ/2 (same arc)
angle PRQ=20° Ans.

angle PQR=angle TSP (exterior angle of cyclic quadrilaterals)
angle PQR =120°

angle PQR +angle PRQ +angle QPR =180°
120° + 20° +angle QPR=180°
angle QPR =180°-140°
angle QPR = 40° Ans.