Diameter = 1.273 inches.
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The circumference of the circle that has a diameter of 4 feet is: 12.57 feet
The circumference of a circle can be calculated using the formula C = 2πr, where r is the radius of the circle. In this case, if the radius is 4 inches, then the circumference would be C = 2 x π x 4 = 8π inches, or approximately 25.13 inches.
When the diameter of the circle doubled, its circumference also doubled.However, its area increased to 4 times the original area, while nobody was looking.
The circumference of a 4 foot diameter circle may be obtained by multiplying the diameter by pi, which is 3.1416 4 X 3.1416 = 13 (rounded to the nearest whole number)
the diagonal of the rectangle will be the diameter of the circle which equals 5 so the circumference will be 5pie or 15.70units.