Ace the GED Math Test 2025 – Conquer Numbers and Unlock Your Future!

The center of a circle is defined as the exact middle point of the circle, where all points on the circle's edge are equidistant from this central point. This central point is crucial as it serves as the reference for constructing the circle itself.

The other options represent different concepts related to circles: the circumference is the total distance around the circle, the radius is the distance from the center to any point on the circle, and the diameter is the distance across the circle, through the center, which is twice the radius. However, none of these terms accurately describe the center, making the exact middle of the circle the correct answer.