How to find the center and radius of a circle?

A circle is formed by the set of points that are at a constant or at a fixed distance (radius) from a fixed point (center) in the plane.

Answer: The center and radius of a circle are C and r respectively.

Explanation:

The center is the point equidistant from all of the points on a circle.

The radius is the distance between the center and any other point lying on the circle.

Answer: The center and radius of a circle are C and r respectively.