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There are 2 formulas for finding the circumference of the circle.If the radius diameter is given,we use the formula �d.When the radius is given,we use the formula 2�R.

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But there are also other formulae for when the area is given, or the length of an arc and the angle subtended at the centre or on the circumference are known. Plus many more. Basically, the question is too poorly specified to find a single answer.

Also, the above formulae assume that the shape is a circle. But it could be an ellipse, for example.

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Q: What is the formula for circumference?
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Related questions

What is the formula of a circumference?

circumference=r2pi


Why the formula of circumference of circle always constant?

Because:- circumference/diameter = pi and when the formula is rearranged circumference = pi*diameter


What is the formula for the circumference of a circle if the diameter is 8.70 m?

The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.


How do you determine the circumference of a circle if you know the radius?

use the formula pi*diameter = circumference and the formula diameter = 2*radius and combine them 2pi*radius = circumference now you have a formula that you can just plug you numbers into. if you have 3 as your radius, then this is how to find the circumference 2pi*3=circumference 6.28*3=circumference 18.84=circumference


Formula for finding the circumference of cone?

There is no circumference of a cone, but, we only do the circumference of the circle. the formula for the circle is pi times D. D= Diameter


What are the similarities of Circumference Formula and Area Formula?

They both are a formula


What is the formula for cicumfrance?

The formula for the circumference of a circle is C = 2πr, where C is the circumference and r is the radius of the circle.


If you have the circumference of a circle what is the diameter?

Formula: diameter = pi / circumference


Formula of circumference?

Formula of Circumference of a circle: 3.14*Diameter of the circle. You could also do: 3.14*3.14*radius.


How do you find the of a circumference of circle in math?

the formula is: circumference= p*diameter


What is the formula for area circumference?

Area = (Circumference)2/(4*pi)


How do you create a circumference formula?

the circumference of a circle is pi time the diameter