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 basic mathematics image

Circumference calculator


The following circumference calculator is easy to use. Just enter the value of the radius and hit calculate button.



Recall that the formula to get the circumference of a circle  

is 2 ×pi×r with r = 3.141592653589793

Therefore, the circumference depends only on the size of r. That is why you only need to enter r here to get the circumference

The calculator will only accept positive value for r since a distance cannot be negative

As a reminder, if r = 4 cm for instance,

circumference = 2 ×3.14 ×4 = 25.12 cm


Enter the radius of the circle:     

       

The result is :  




Fun math game: Destroy numbered balls by adding to 10








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