What is the term for the distance from the center of a circle to a point on its edge?

The distance from the center of a circle to any point on its edge is known as the radius. The radius is a fundamental concept in geometry, representing half the diameter of the circle. This measurement is crucial for many calculations involving circles, such as determining the area and circumference.

In contrast, the diameter refers to the distance across the circle, passing through the center, which is twice the length of the radius. The circumference is the total distance around the circle and is calculated using the formula (C = 2\pi r), where (r) is the radius. A chord is a line segment with both endpoints on the circle, but it does not measure the distance from the center to the edge. Understanding these terms helps build a solid foundation in circle geometry.