If 9 cm is the diameter, I think the circumference should be 9 times pi centimeters, which is approximately 28.274333882308139146163790449516 centimeters for the circumference. *********************************************** The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. Thus: 3.14 x 9 = 28.26cm
If the diameter of a circle is 9 the circumference is: 28.3
If a circle has a circumference of 9, the diameter is: 2.864
28.3/pi ie 9 cm
A circle with a diameter of 9 feet has a circumference of about: 28.27 feet (diameter x Pi = circumference).
The circumference of 9 inch diameter circle is about 28.27 inches.
The circumference C = diameter d times pi. C = 9 times 3.14159 = 28.274334 for a circle of 9 units You have only to choose for the circumference and for the diameter the same unit. Then it work for meters, centimeters, inches, and marsian bobugs,
Circumference of any circle = (pi) x (diameter) Circumference of this circle = (pi) x (9 feet)
circumference = 2*pi*9
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
If radius of a circle is 9 centimeters the circumference would be: 56.55 cm (r x 2 x Pi = circumference).