Question

What is the radius of the circle?

Answer 1

Answer: 4 Units

Explanation:

A radius of a circle is simply the distance between the middle of the circle and the edge of the circle. Since you're supplied with a graph, simply count the amount of points between the center, which is (0,0) on this circle, and the edge, which is (4,0) on this circle.

Answer 2

Answer: 4

Explanation:

A radius is the distance from the center of the circle to one of its point.

The center as you can see is (0,0) and if you choose any of the circle's point you can see that the distance is 4.

For example, the distance from (0,0) to (4,0) is 4.