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TR is the tangent to the circle PQR with centre... - WAEC Mathematics 1997 Question

TR is the tangent to the circle PQR with centre O. Find the size of ∠PRT

A
44o
B
46o
C
60o
D
74o
correct option: c

Reflex < POQ = 360° - 148° = 212°

< PRO = 360° - 330° = 30°

But < ORT = 90° \(\implies\) < PRT = 90° - 30° = 60°

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