Question

What is the radius of the circle? Example how you know..

Answer 1

The radius of the circle is 7 units.

Explanation:

Radius is the measure from the center point of a circle to a point on the outside edge. Since you have coordinates, you can find the radius using distance formula.

You could also just count how many units are between the center and the edge to get 7 units because 8 - 1 = 7

Answer 2

r=7

Explanation:

C is at x=1 at circle side is at 8

8-1= 7

so, r=7