circumference = π x diameter
=> diameter = circumference ÷ π
~= 20ft ÷ 3.14
~= 6.37 ft
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The circumference of a circle with the diameter of 14 ft is: 44 feet.
The circumference of a circle whose diameter is 1.5 ft is: about 4.712 feet.
If the circle is 20 ft radius, the area is π·20² = 1256.637 ft² If the circle is 20 ft diameter, the area is π·(20/2)² = 314.1593 ft² If the circle is 20 ft circumference, the are is π·(20/2π)² = 63.66198 ft²
A circle with a diameter of three feet has a circumference of 9.4 feet.
Circumference of the circle = 7*pi feet