Question

If the radii of two concentric circles are 4 cm and 5 cm, then
find the length of chord of one circle which is tangent to the
other circle.​

Answer 1

Answer:

6cm

Step-by-step explanation:

by applying pythagoras theoram.

Answer 2

Step-by-step explanation:

Let A & B be the tangent to smaller circle.

And O be the centre of small cirlcle.

So, By Pythagoras theorem

AB=3cm

So lenght of chord = 2 AB = 2 × 3 = 6cm