No, tangent circles do not have the same center. They just touch at the side.
Here is an example:
Chat with our AI personalities
If the two circles are tangent to each other,then it must be at the same point.
A line joining the centres of two tangent circles also passes through the point of tangency.
If the circles have the same radius then an infinite number, and if they do not, then none.
concentric circles
Tangent circles are circles that touch one another without crossing. The distance between the centres of the circles must be equal to the difference or the sum of their radii.