Question

What do concentric circles share?

Answer 1

Answer:

Concentric circles share a common center (the same center).

Answer 2

In geometry, two or more objects are said to be concentric, coaxal, or coaxial when they share the same center or axis. Circles, regular polygons and regular polyhedra, and spheres may be concentric to one another (sharing the same center point), as may cylinders (sharing the same central axis).