Question

A circle has its centre at O . A tangent drawn from a point P , which is situated outside the circle, touches the circle at A. If PA = 4 cm & PO=5 cm, then the length of the radius of the circle is

A) 1 cm B) 2 cm C) 3 cm D) 4 cm

Answer 1

Answer:

3cm is answer

Step-by-step explanation:

in triangle AOP

(op)^2=(ap)^2 + (ao)^2

(5)^2=(4)^2+(ao)^2

25=16+(ao)^2

(ao)^2 =9

(ao)=3cm