It depends. If it gives you the Radius or if it gives you the Diameter.
Ex for radius. C=2*3.14*R
Ex for Diameter. C=3.14*D
However, remember that 3.14 is an approximation of Pi.
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The circumference of a 34mm circle is: 107 mm
The circumference of this circle is about 14.45 units.
The circumference is the length around the outside of the circle. The circumference is equal to 2pieR (2xPiexRadius)
A circle has the radius of 27.7 cm what is the approximate circumference of the circle? The circumference is approx. 174 centimeters.
The circumference of a circle is the distance arround the edge of the circle. The area of a circle is how big the inside of the circle is.