The radius of a circle with a circumference 36 inches is: 5.73 inches.
The radius of a circle whose circumference is 36 pi (113.1) is: 18 (circumference divided by Pi divided by 2 = radius)
36
5.729"
Circumference = 36*pi
The radius is 18.
Circumference of any circle = 2*pi*radius or diameter*pi
A circle with a radius of 18 inches has a circumference of 113.097 inches.
The answer depends on what is 36 cm: the radius, diameter or some other aspect of the circle.
It is: 36*pi
C = ~226.195 mm
circumference of a circle = 2*pi*radius or pi*diameter