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Circumference = 2 x PI x radius. So, if circumference = 14 x PI, then the radius is 7
The radius of the circle is 7.
Circumference = pi x r squared: where pi = 3.14159 and r = radius (squared) Circumference = 3.14159 x 7 x 7= 153.938 feet
Assuming that "it" refers to diameter, the radius is 7 cm and the circumference is 44.0 cm.
The circumference is about 43.98 inches. The circumference of a circle is diameter (radius x2) x pi (3.14).