42 pi km ~ 131.946891
The circumference of a circle is the perimeter of the circle for a given diamater.
The perimeter of a circle is its circumference
Nobody is the circumference of a circle!
The perimeter of a circle is its circumference
The round perimeter of circle is its circumference
The distance around a circle is its circumference
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
The circumference of a 9 circle is: 28.3
The circumference of a 30 circle is: 94.25
An arc is a portion of the circumference of a circle.
If the diameter of a circle is 69mm then the circumference is: 216.8mm (diameter x pi = circumference).