The circumference is 2 * pi times the radius, or c = 2 * pi * r. The diameter is twice the radius, so c = pi * d, where d is the diameter.
Insert mode
Chat with our AI personalities
If a circle has a circumference of 9, the diameter is: 2.864
A circle with a diameter of 9 feet has a circumference of about: 28.27 feet (diameter x Pi = circumference).
Circumference of any circle = (pi) x (diameter) Circumference of this circle = (pi) x (9 feet)
The circumference of a circle is equal to Pi x diameter. So, 9 x 3.1416 = about 28.274 units.
56.548667764616276 circumference = PI * diameter