Circumference

Circumference is the distance around the outer edge of a circle. Think of it as the perimeter of a circular shape. If you imagine a round table, the circumference is the length of the string needed to completely go around it. It is related to the circle's size and is calculated by multiplying the diameter (the straight line passing through the center) by a constant called pi (approximately 3.14). Essentially, the circumference is a way to measure how big a circle is in terms of its perimeter.