diameter x pi
The formula is pi multiplied by the diameter
Diameter of circle: 13/pi = 4.138 ft to 3 decimal places
It is the distance around a circle and is found by 2*pi*radius or diameter*pi
36/pi = 11.4591559 inches
circumference = pi*diameter so diameter = circumference/pi = 19.1 metres.
If the diameter is known, don't bother measuring the circumference.Simply multiply the diameter by 'pi'.
The circumference of any circle is the irrational number "pi" (very approximately 3.1418) times the diameter of the circle.
Either pi times the diameter or pi times twice the radius (which is the diameter)
Just over 25' ( 8 x pi)
The circumference of a circle with a diameter of 27 is: 84.823
19 pi, ie 19 x 3.1415 = 59.69