A circle with a diameter of 8 inches has a radius of 4 inches. To find the radius of a circle based on a given diameter, divide the diameter by 2. Consequently, to find the diameter, multiply the radius by 2.
The radius of a circle is defined as any line segment that connects to the center point of a given circle. The diameter, on the other hand, is any line segment that passes through the center point of a circle, extending from one end to the other. The diameter of a circle is always twice as long as a radius.