This may be a specific number of decimal places or significant figures. The circumference of a circle is the distance around the shape. The circumference is the perimeter of the circle.

One can understand that if the earth is a sphere. In fact, from the angle of the sun’s rays from the vertical on June 20 and the distance from Alexandria to Syene he was able to deduce the ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr ...