Question

The tangent PA has drawn to a circle with centre O from the external point P. If PA = 4 cm, and OP = 5 cm, find the radius of the circle

Answer 1

Answer:

let the radius be OA.

given that op=5cm and PA =4cm...

if. you join O to the point of contact you will get the radius

and if u observe..you can find a right angle triangle..hence by Pythagoras theorem you will get the value of OA that is equal to 3