Find the complete distance around a circular object. With this circumference calculator you can learn the circumference, radius, diameter, and close range for any circle.
Definition of circumference:
The circumference represents the straight distance around the outside of the circle.
The circumference of a circle is just like the perimeter of a polygon. The ratio of the circumference to the diameter of a circle is constantly equal to π.
The circumference of a circle for any given variable can be calculated using the method:
C = 2πr = πd
Where:
π = pi = 3.14159
In opposite to determine the radius and diameter of a given circular shape, we will use the circumference calculator but for manual calculations here are formulas for the radius & diameter.
r = d/2
d = 2r
A = πr2 = πd2 / 4
If the diameter of a circle is 22cm, then what is the circumference of that circle?
Solution:
The formula to find the circumference is:
C = 2πr = πd
Insert the values into the formula:
C = 3.14 * 22cm
C = 69.08cm
