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Calculator: Circumference of Circle

Calculate the Circumference of a Circle

Formula for the circumference of a circle depends on what is given to you.
1) Given: Diameter of a circle

Then, Circumference  =  π  × Diameter

2) Given: Radius of a circle

Then, Circumference  =  2 × π × Radius

3) Given: Area of a circle

Then, Circumference  =  2 × √(π × Area)



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