The circumference of a circular rug is 25.12 What is the radius?

Circumference is the measure of the distance around the circle. To find the radius of a circle, you must understand how to get the circumference from the radius.

The circumference of a circle can be expressed as C=(Pi)D where C is circumference, Pi is the mathematical constant pi, and D is diameter of a circle.

The first thing you have to do, is find out what Pi, and D are.

We will use the value 3.14 for pi, so we have 25.12 = 3.14(D). You can isolate D by dividing both sides of the equation by 3.14.

25.12 = 3.14(D)

25.12/3.14 = D

8 = D

Now we have the diameter of the circle. Finding the radius from the diameter is simple, you divide by 2.

D = 2r

8 = 2r

8/2 = r

4 = r

The radius of the circle is four.