Question

Two concentric circles are of radii 10 cm and 8 cm. Find the length of the chord of the larger circle which touches the smaller circle.

A)

6 cm

B)

3 cm

C)

8 cm

D)

​

Answer 1

Answer:

Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.