diameter = 9 ft
radius = 3 ft
C = 2pir = 2(pi)(3) = 6pi ≈ 18.85 ft
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A circle with a diameter of 9 feet has a circumference of about: 28.27 feet (diameter x Pi = circumference).
56.548667764616276 circumference = PI * diameter
Circumference of any circle = (pi) x (diameter) Circumference of this circle = (pi) x (9 feet)
If the circumference of a circle is 20 feet the diameter is: 6.366 feet (circumference divided by pi = diameter).
The circumference of a circle with a diameter of 50 feet is about 157.1 feet. (diameter x Pi = circumference).