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Circumference = 2 * radius * pi (where pi is approx = 3.14159)

So Radius = Circumference / (2 * pi)

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Circumference = 2*pi*radius

Q: When given radius how do you find the circumference?

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Divide the circumference by 2PI to find the radius. ( C = 2PI*Radius)

Diameter = circumference/pi Radius = circumference/2*pi

If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)

To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi

divide 3.14 by circumference and d=2r

Divide the circumference by (2*pi)

Radius = square root of (area/pi) Circumference = 2*pi*radius

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

If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.

the Circumference is pi times 2 times radius If you know circumference then you can find the radius. once you know the radius just multiply by 2 to find the diameter.

Divide the circumference by the value of Pi, then halve that result.

circumference of a circle = 2*pi*radius or pi*diameter

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