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A circular park has a lamp post at point P outside it. Two straight pathways are laid from P, each just touching the boundary of the park (tangents).
The two pathways meet the boundary at points A and B, and the angle between the pathways at P is 50°.
What is the measure of angle AOB at the centre O of the park?

Class 10Number of Tangents from a PointGeometry
  • A50°
  • B100°
  • C130°
  • D150°

Step-by-Step Solution

OAPB is a quadrilateral with angle OAP = angle OBP = 90°, so angle AOB = 180 - 50 = 130°.
Answer: C) 130°

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