# What is half of a diameter of a circle called?

We will use the definition of the radius of the circle to answer this question.

## Answer: Half of a diameter of a circle is called the radius.

We will see how the diameter and radius of the circle are related to each other.

**Explanation:**

The radius of a circle is the length of the line segment from the center of a circle to a point on the circumference of the circle and diameter is a line segment from one end of the circle to the other end of the circle passing through the center of the circle. So, the radius is half the length of the diameter.