A circle measures ____.

To find the measure of a circle, we need to know which specific measurement we are referring to. There are a few different measurements that can be associated with a circle:

1. Diameter: The diameter of a circle is a straight line that passes through the center of the circle and touches two points on the circumference. The measure of the diameter is the length of this line segment.

2. Radius: The radius of a circle is the distance from the center of the circle to any point on the circumference. The measure of the radius is the length of this line segment.

3. Circumference: The circumference of a circle is the distance around its outer edge. It is the perimeter of the circle. The measure of the circumference is given by the formula C = 2πr, where r is the radius of the circle.

4. Area: The area of a circle is the amount of space enclosed by the circle. The measure of the area is given by the formula A = πr^2 (pi times the square of the radius).

Therefore, to answer your question, we need to specify which measurement you are referring to.