Circumference = pi x 2 x r = 3.1415 x 2 x 27 = 3.1415 x 54 = 169.641 inches
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The circumference of a circle if the radius is 27 inches is: about 169.6 inches. (you can do this type of calculation for other circles using this formula: r x 2 x Pi = circumference).
The circumference of a 27-inch circle is: 84.8 inches.
Assuming a spoke represents the radius of the circle, each one would be 4.29 inches long. When given the circumference (27 inches), the radius (spokes) is calculated using the formula r = C / 2(pi); or Radius = 27 inches / [2(3.14)].
The radius is 4.3 feet.
27 inches