Question

What is the radius of a circle

Answer 1

A radius is a straight line from the center of a circle to the circumference of a circle. If you have two or more of them, they are referred to as radii. All radii in a circle will be the same length

Explanation:

So take a circle, when finding the area of it or the circumference of it there should be a line in the middle of it. Sometimes it is halfway through and sometimes it goes all of way through

Answer 2

The radius is the measure from the outside of a circle, to the center point in the middle of the circle.

Hope this helps, I added a picture of what a radius looks like... :)