In Fig. 9.2, $PQ$ is a chord of a circle and $PT$is the tangent at $P$ such that $\angle QPT = 60^\circ$ Then $\angle PRQ$ is equal to
A. $135^\circ$
B. $150^\circ$
C. $120^\circ$
D. $110^\circ$
Answer:C
In Fig. 9.2, $PQ$ is a chord of a circle and $PT$is the tangent at $P$ such that $\angle QPT = 60^\circ$ Then $\angle PRQ$ is equal to
A. $135^\circ$ B. $150^\circ$ C. $120^\circ$ D. $110^\circ$