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Q: How do you find the diameter and then the circumference if you have the radius?

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

Divide circumference by pi, that gives diameter. Radius is half of diameter

pi X diameter finds the circumference so circumference divided by pi will leave the diameter. half the diameter to find the radius

Divide the circumference by pi which is 3.14 to find the diameter; then divide the diameter by two to find the radius GOOD LUCK

If you have the circumference: circumference = (pi) * diameter diameter = circumference / (pi) If you have the area: area = (pi) * radius * radius radius = square_root(area / pi) radius = diameter / 2 diameter = 2 * square_root(area / pi)

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

You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).

Okay finding circumference from knowing the radius right? The radius is equal to half the diameter and circumference is equal to pi * diameter. So double the radius and multiply it by 3.14 then you will get the circumference!

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

rx2x3.1416=circumference or diameter x pi=circumference

Diameter = Radius*2 = 14 units. Circumference = pi*Diameter = 43.98 units.

divide the circumference by pi ( 3.146) which will give you the diameter divide that by 2 and you have the radius

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