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The formula for the circumference (C) of a circle is C = 2πr or C = πD, where r is the radius and D is the diameter.

If you know the circumference then C/π = D

So just divide the circumference by pi to get the diameter.

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Q: How would you figure out the diameter if you had the circumference?
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Related questions

How do you figure out the diameter if they only show circumference?

Circumference equals pi times the diameter, so you would divide by pi. (3.14159265...)


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