TR is the tangent to the circle PQR with centre O. Find the size of ∠PRT
Attached Figure / Diagram
A
44o
B
46o
C
60o
D
74o
E
118o
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
Reflex < POQ = 360^\circ - 148^\circ = 212^\circ
< PRO = 360^\circ - 330^\circ = 30^\circ
But < ORT = 90^\circ \(\implies\) < PRT = 90^\circ - 30^\circ = 60^\circ
Source: Myschool Past Questions Archive (Record #23884)