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C is a point on a circle with centre O, and ∠ACB = 48°, where A and B also lie on the circle and C is on the major arc. Find ∠AOB.

Competition practiceGeometry
  • A96°
  • B48°
  • C24°
  • D132°

Step-by-Step Solution

The angle at the centre is twice the angle at the circumference on the same arc: .
Answer: A) 96°

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