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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.

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Q: What is circumference of a circle with a diameter of 9?

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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

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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

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.

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

28.26

The diameter of a circle who's circumference is 28.26 miles is: nine (9) miles

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

28.27 units.

Doubling the radius doubles the circumference.