A point P is outside a circle. The length of the tangent from P is 10 cm, and the distance from P to the center is cm. What is the radius of the circle?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 5 cm.
Let radius (OA) = r cm
102 + r2 = (√125)2
⇒ 100 + r2 = 125
⇒ r2 = 25
⇒ r = 5 cm