How To Work Out Circumference Of A Circle. C 2 pi r Question. The circumference of a circle is merely the distance around a circle.
Textcircumference pi times textdiameter Pi π For any circle. This tells us that the circumference of the circle is three and a bit times as long as the diameter. The circumference of a circle is found using this formula.
Work out its circumference using pi 314.
When the area of a circle is known we can write the formula to find the perimeter of the circle as. Multiply the result by π or 314 for an estimation. You can also calculate the circumference of a circle using the diameter with the equation C Π d. C 4πA Here C Circumference of the circle.