Then the diameter is 16.
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Radius of circle: 8/2 = 4 inches
Circle with a radius of 8 feet equals a circle with a diameter of 16 feet.
If the radius of a circle is 8 feet the circumference is about 50.27 feet.
Radius of circle: 8/2 = 4 units
The radius is the line from the center to the outside of the circle, therefore the width of a circle is twice the radius. 2 x 8 feet =16 feet