Question

what is concentric circle?

Answer 1

Concentric circles are circles with a common center. The region between two concentric circlesof 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.

Answer 2

hey dear.. Concentric circles are simply circlesthat all have the same center. They fit inside each other and are the same distance apart all the way around. In the figure above, resize.. either circle by dragging an orange dot and see that they both always have a common center point.