circumference = 2 x π x radius
⇒ radius = circumference ÷ (2 x π)
Divide the circumference by two times π (≈ 6.283).
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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.