Diameter = circle's circumference/pi
You multiply the circle's diameter by 3.14 (Pi) to get the circumference.
The circumference of a circle with a diameter of 18 inches is 56.5 inches.
Multiply the diameter by the constant pi.
Since circumference is found by multiplying pi by the diameter of the circle, the diameter can by found using the inverse operation. diameter = circumference/pi
Diameter = circle's circumference/pi
You multiply the circle's diameter by 3.14 (Pi) to get the circumference.
Pi x diameter
The circumference of a circle with a diameter of 18 inches is 56.5 inches.
Divide the circumference by Pi.
multiply the diameter times pi (3.14159265)
Multiply the diameter by the constant pi.
Diameter of a circle = circumference/pi
pi times diameter
Divide the known circumference by pi to find the diameter of the circle.
circumference of a circle = pi*diameter or 2*pi*radius
Since circumference is found by multiplying pi by the diameter of the circle, the diameter can by found using the inverse operation. diameter = circumference/pi