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Circumference of a circle is: 2*pi*radius or pi*diameter

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Q: What is the circumference of 9 feet?
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A circle with a diameter of 9 feet has a circumference of about?

A circle with a diameter of 9 feet has a circumference of about: 28.27 feet (diameter x Pi = circumference).


What is the approximate circumference of 9 feet?

If its the diameter you have, then take pi as 3, multiply by the diameter, in this case 3 * 9 = 27 feet circumference approx.


The diameter is 3 feet what is the circumference?

9 feet 5.1 inches


Circumference of a 18 feet diameter circle?

56.548667764616276 circumference = PI * diameter


What is the circumference of a circle with the radious of 9 feet?

Circumference C = 2*Pi*r, where r is the radius. Pi ~= 3.14159265C=2*Pi*9 ~= 56.55 square feet.


How many sq feet in a 9' circle?

You should say if the 9 feet is a radius, diameter or circumference.....if radius then 254.47 feet


What is the circumference of a 9 feet diameter circle?

9*pi or 2*pi*4.5


What is the circumference of a 9ft diameter circle?

Circumference of any circle = (pi) x (diameter) Circumference of this circle = (pi) x (9 feet)


What is the circumference of a circle if the area is 81 pi square feet?

If: pi*radius2 = 81*pi sq ft Then: radius = 9 feet Circumference = 2*pi*9 = 56.549 feet rounded to 3 decimal places


Which equation can be used to find the circumference of 9 feet?

It is not clear whether the circumference is 9 feet and you want the radius or diameter, or you have either the radius or diameter - which is 9 ft - and you want the circumference. The formulas are Circumference = 2*pi*r = 2*pi*d where r is the radius, d the diameter, and pi is the mathematical constant approximated by 3.14159


If a circle has a diameter of 9 feet what is the circumference in inches?

Circumference of circle in inches: 108*pi = 399 inches to the nearest whole number


The area of a circle is 81 pi square feet What is the radius?

The area is 9 feet. You find the square root of 81 which is 9. I want circumference, not area.