Question

what is the center of the circle shown below?
a. a
b. $overline{ab}$
c. b
d. y

Explanation:

The center of a circle is the point equidistant from all points on its circumference. In the diagram, point B is inside the circle, and segment $\overline{AB}$ is a radius (connecting the center to the circumference at A), while A and Y lie on the circle's edge. $\overline{AY}$ is a chord, not a point.

Answer:

C. B