Circumference of a circle is pi * diameter. Diameter is 2 * radius. So if you know the radius, circumference is 2 * pi * radius. Now choose an appropriate approximation for pi (3.14, or 3.1416, or even the fraction 22/7), depending on your application. This will work for ANY circle, no matter how big or small it is, as long as it's a true circle and not a different elliptical shape, e.g. an oval.
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
diameter = circumference/pi
You cannot find the diameter of something from its circumference unless it is a circle and, in that case, diameter = circumference/pi
circumference = pi x diameter
by timesing the circumference by pie
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
Pi X D = Circumference. To find Diamater if you know Circumference, divide Circumference by Pi (3.14).
Diameter = Circumference/pi
You divide the circumference by pi.
Circumference = π * Diameter
diameter = circumference/pi
If you know the circumference of a circle, you can find the radius by dividing the circumference by the value of Pi (3.14159...)
You cannot find the diameter of something from its circumference unless it is a circle and, in that case, diameter = circumference/pi
Divide the circumference by Pi to find the diameter.
Divide the circumference by PI (3,14159...)
The circumference is: 32.1
Circumference = Pi * diameter