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# How do you calculate circumference when you know diameter?

Updated: 12/18/2022

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Q: How do you calculate circumference when you know diameter?
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### How do you calculate the diameter of a circle?

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

### How do you calculate the circumference of a circle if you know the diameter?

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

### How do you calculate the diameter of a circle if you know the circumference?

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

### How do you find the length of of the radius of a circle?

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

### What may be calculated from its diameter?

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

### How do you calculate the circumference of a circle given the diameter or the radius?

Circumference = diameter*pi

### How do you calculate circumference?

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!

### How can I calculate the 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

### How can i find circumference if you know diameter?

Circumference = Pi * diameter

### What is circumference if you know diameter?

The circumference is the diameter x 2.

### How is pi used to calculate the circumference?

pi times diameter = circumference

### How to calculate the diameter of a circle when the circumference of the circle is 7?

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