Yes. "Centre" is the British spelling of "center".
having the same center
Sharing the same center.
They are two words that mean the same thing
Concentric means having a common center, such as circles within circles where each one shares the same central point.
mean does not mean the center of the data
mean does not mean the center of the data
Circles in the same plane with the same center are concentric circles.
No passing by traffic travelling in your same direction.
No passing by traffic travelling in your same direction.
the commercial center.
Yes, it is. Circles that are in the same plane and having the same center are called congruent circles.
Probably the same as the center of YOUR galaxy.