How do you find the circumference in centimeters?

You can either measure it in inches and convert it to centimeters, or most rulers come with both a standard and metric system side.rcum

The formula for finding the circumference is Pi x Diameter

The diameter is a straight line from one side of the circle to the other, passing through the central point.

Pi to 4 decimal places is 3.1416

If, for example, your diameter is 10cm, you would multiply 10 by 3.1416, which would give you 31.416, or 31.42 rounded to 2 decimal places.