diameter x pi
7/8 inch circle has a diameter of 7/8 and a radius of 7/16=.4375 circumferance of a circle = 2*pi*radius = 2*3.14*.4375 =2.7475 or 7*pi/8
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
What is 27 X 3.14? 27 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)
39 inches / pi = 12.4 inches