How to find circumference?
Knowing how to find the circumference of a circle can help you in many ways. To find this, you need to first know the diameter of the circle. The diameter is the length of a straight line drawn from one side of a circle to the other, through the center point. Once you have this, you simply multiply the diameter by pi (3.14). Look here for more information: http://www.mathgoodies.com/lessons/vol2/circumference.