Circumference = (pi) x (diameter) = 14 pi = 43.9823 inches (rounded)
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The circumferance is found by using the formula 2(r)(pi). r stands for the radius. The diameter, which is already given in the problem, is two time radius. Therefore the only thing you really have to do is multiple the diameter= 3 inches by pi. Circumferance is 9.425 inches.
A circle 14 inches in diameter has a radius of 7 inches, and a circle having a radius of 7 inches has a diameter of 14 inches.
Circumference of a circle is pi times diameter therefore C = pi(3.14159265359) * 6 = 18.84955592154 say 18.85 inches (3.14159265359 is the approximate value of pi)
The area of a circle that has a diameter of 14 inches is: 153.9 square inches.
14 pi inches