A line that is drawn straight through the midpoint of a circle and that has its end points on the circle border is called the diameter d Half of the diameter or the distance from the midpoint to the circle border is called the radius of the circle r. The circumference of a circle can be calculated using the following formula. Your answer will appear in the circumference field.
C i r c u m f e r e n c e p d i a m e t e r.
Both 2 and p are constants so the formula can be simplified to the following. Circumference of a Circle. Check this 3-minute Math video to have a visual understanding from online Math lessons and to. Circumference of Circle Formula The circumference of a circle is merely the distance around a circle.