The circumference of a circle is 2*Pi*Radius or Pi*Diameter.
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2r * 3.14(pi)
Where r is radius. It can also be written like this:
d * 3.14
Where d is diameter.
The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.
Formula of Circumference of a circle: 3.14*Diameter of the circle. You could also do: 3.14*3.14*radius.
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
Circumference of a circle = 2*pi*radius
A simple formula to calculate the circumference of a circle: so in this case: