The circumference is 12.57 feet. (radius x 2 x pi = circumference)
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The formula for circumference of a circle is 2πr. Since the radius is 4, the circumference is 8π or approximately 25.12 inches.
The circumference of a circle with a radius of 4 ft is: 25.13 feet (r x 2 x Pi = circumference).
Circumference of a circle = 2*pi*radius = 8*pi or 25.13274123 units
A circle that is 25.13272 cm in circumference.
Radius of the circle: 25.12/2pi = 4 meters rounded