Q: How do you calculate circumference when you know diameter?

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If you know the circumference, the ration of the diameter to the circumference is π, so diameter = circumference/π If you have the radius, diameter = 2 x radius

To get the diameter d is to divide the circumference C by pi. d = C / pi

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

Circumference = diameter*pi

to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!

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If you know the circumference, the ration of the diameter to the circumference is π, so diameter = circumference/π If you have the radius, diameter = 2 x radius

Multiply the diameter by Pi as the formula Pi x d = Circumference. Where d stands for diameter.

To get the diameter d is to divide the circumference C by pi. d = C / pi

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

If by "it" you mean a circle, once you know the diameter, you can calculate its radius, its circumference, and its area.

Circumference = diameter*pi

to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!

To calculate circumference you find a circle's radius or diameter. You do diameter times pi or radius times 2 times pi. Then you have circumference!Read more: How_do_you_calculate_circumference

Circumference = Pi * diameter

The circumference is the diameter x 2.

pi times diameter = circumference

pi*diameter = circumference Rearrange the formula so as the diameter is the subject of the formula: diameter = circumference/pi diameter = 7/pi = 2.228169203