Question

In the given figure,O is the centre of the circle and PA is tangent to circle at A. If AP = 12 cm and OP = 13 cm,

then find the radius of circle.
Answer Fast
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Answer 1

AS ANY TANGET IS PERPENDICULAR TO RADIUS

WE CAN USE PYTHAGORAS THEOREM

(OP)² = (AP)² + (AO)²

13² = 12² + (AO)²

169 - 144 = (AO)²

25 = (AO)²

AO = 5 cm

So radius is 5cm