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there we go :)
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).
A circle with a radius of 8 inches has a circumference of 50.27 inches.
The radius of a circle with a circumference 36 inches is: 5.73 inches.
A circle with a radius of 16 inches has a circumference of 100.53 inches.
The circumference of a circle with a radius of 10 inches is about 62.83 inches.
The circumference of a circle with a radius of 4.246 inches is about 26.68 inches.
A circle with a radius of six inches has a circumference of 37.7 inches.
A circle with a radius of 2.5 inches has a circumference of 15.71 inches.
A circle with a radius of 21 inches has a circumference of 131.95 inches.
A circle with a radius of 9 inches has a circumference of 56.55 inches.
A circle with a radius of 72 inches has a circumference of 452.39 inches.
The radius of a circle with a circumference of 272.2 inches is 43.3 inches.