Yes. The circles can be of different size. These are called concentric circles.
Circles in the same plane with the same center are concentric circles.
Yes, it is. Circles that are in the same plane and having the same center are called congruent circles.
concentric circles
concentric circles
No, tangent circles do not have the same center. They just touch at the side. Here is an example:
Concentric circles
concentric circles
Concentric circles.
concentric circles
Concentric circles.
concentric circles
Yes.yes they do