Easy. First, double the radius to get the diameter. Next, multiply the diameter by Pi (about 3.1416) to determine the circumference.
Chat with our AI personalities
circumference of a circle = 2*pi*radius or pi*diameter
If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)
Diameter of a circle = 2*radius Circumference of a circle = 2*radius*pi
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
Circumference of a circle: 2 x pi x radius.