Question

There are two concentric circles with radii 5cm and 3cm a chord of a larger circle touches the smaller circle find its lengtth

Answer 1

Answer:8

Step-by-step explanation:

As shown in figure (not up to scale)

It is clear that chord to larger circle is tangent to smaller circle.

And It forms right angle triangle AMO Where M is Mid point of AB.

By Pythagoras theorem length of AM = 4

AB = 2AM

AB = 8 = length of chord.

Hope it helps you...