If the circumference of a circle is 65.98 cm the radius is about 10.5 cm
The formula C = pi (2r) means that r = 1/2 (C/pi)
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The circumference of a circle if the if the radius is 6 cm is: 37.7 cm
The circumference of a circle with a radius of 8.5 cm is: 53.407 cm
A circle with a radius of 17 cm has a circumference of 106.81 cm.
A circle with a radius of 13.8 cm has a circumference of 86.71 cm.
The circumference of a circle if the radius is 5 cm is: 31.42 cm (radius x 2 x Pi = circumference).