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π is the ratio between the diameter and the circumference of a circle so the formula would be :

Circumference = π x Diameter

or alternatively (since the radius is half the diameter)

Circumference = 2π x Radius.

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Q: What is th formula for the circunference of a circle?
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Related questions

What is a circunference?

the distance around a circle


How do you find the circunference of a circle?

Multiply the diameter by 'pi' .


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If the circle's circunference is 128 then radius is 128/2pi = about 20.372 inches


How do you determine the value of pi?

The value of pi is the relationship of a circunference to its diameter. For instance, if you have a circle whose circunference is 9.42477 cm, you shall have a diameter of 3 cm. Any measure of a circunference divided by its diameter shall generates the same numeric value, the pi number.


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If you are referring to the diameter(the distance across the circle or the length of the longest line segment that is passing through the center of the circle), then the answer will be 12 in, since that the diameter is twice the length of the radius. But if you are talking about the circunference, you could use the formula C=2pi(r) or C=pi(d). Thus the answer will be 37.68 in. Please be more specific next time you ask...=)


What is the word pi mean?

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