How do u find the circumference of a circle

C=3.14d this means circumference = 3.14 * half of the circumference

The formula is:
c= 2 (π)r

steps:
a.) you multiply 2×π (which π=3.14)
b.) so 2×π then multiply the radius ( which is half of the diameter of the circle if your equation doesn't already have the radius listed.)