Question

The length of the tangent from a point a is at a distance of 5cm and from the centre at a distance of 4cm . find its radius .​

Answer 1

Answer:

according to Pythagoras theoram

r^2+l^2 = d^2

r^2 = 5^2 - 4^2

r^2 = 25-16

r^2 = 9

r = 3