To find a circumference of a circle u take the diameter (distance from side to side through the middle) and multiply it by pi (3.14)
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Most scientific calculators have a button for pi. So to find the circumference of a circle multiply pi by the diameter. If there is no pi button you can approximate pi as 3.14.
A circumference is 4
The diameter times pi. Pi is approximately 3.1416. Scientific calculators also have a button to quickly access the value pi.
25.13 feet is the circumference. (diameter x pi = circumference).
The circumference is the distance around a closed curve. Circumference is a special perimeter.