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

Mathematics
WAEC 1997

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

  • A. 44o
  • B. 46o
  • C. 60o
  • D. 74o
  • E. 118o
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Correct Answer: Option C
Explanation

Reflex < POQ = 360° - 148° = 212°

< PRO = 360° - 330° = 30°

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

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