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Two tangents PA and PB are drawn from an external point P to a circle of centre O.
It is given that triangle PAB is equilateral.
What is the measure of angle AOB at the centre?

Class 10Number of Tangents from a PointGeometry
  • A60°
  • B90°
  • C120°
  • D150°

Step-by-Step Solution

Triangle PAB equilateral means angle APB = 60°. Then angle AOB = 180 - 60 = 120°.
Answer: C) 120°

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