What is the radius of a circle with a 20-foot diameter?

The radius of a circle is defined as half the length of its diameter. In this case, the diameter is given as 20 feet. To find the radius, you simply divide the diameter by 2.

So, 20 feet divided by 2 equals 10 feet. This calculation shows that the correct radius is indeed 10 feet. Understanding the relationship between the diameter and radius is fundamental in geometry and helps in solving various problems involving circles.