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In the diagram above, O is the center of the circle PQRS and ∠QPS =...

Mathematics
WAEC 1992

In the diagram above, O is the center of the circle PQRS and ∠QPS = 36°. Find ∠QOS

  • A. 36o
  • B. 72o
  • C. 108o
  • D. 144o
  • E. 288o
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Correct Answer: Option B
Explanation

< QOS = 2 < QPS (angle subtended at the centre)

\(\therefore\) < QOS = 2 x 36° = 72°

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