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From an external point P, a tangent of length 12 cm is drawn to a circle of radius 5 cm. Find the distance OP from the centre to P. (answer in cm)

Competition practiceGeometry
  • A13
  • B17
  • C12
  • D11

Step-by-Step Solution

The radius is perpendicular to the tangent at the point of contact. OP = √ √(144 + 25) = √169 = 13.
Answer: A) 13

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