Question

draw two concentric circles of radii 2cm and 5cm. take a point P on the outer Circle and construct a pair of tangents PA and PB to the smaller circle. measure PA.​

Answer 1

Answer:

√21cm

Step-by-step explanation:

let centre of outer circle be O

In triangle OAP

OA^2+AP^2=OP^2(tangent is perpendicular to radius)

2^2+AP^2=5^5

AP^2=5^2-2^2

=25-4

=21

AP=√21