Question

13. Define concentric.circle​

Answer 1

Answer:

When two circles intersect, the common chord through one of the intersections is the longest when its endpoints are diametrically opposite the other point of intersection in the two circles. This property is extended to three concurrent circles. Circles (A), (B), and (C) concur at point D.

Answer 2

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