Find the radius of a circle with a circumference of 64 inches?

1 Answer
Oct 17, 2017

r = 32/(pi) ~~10.186

Explanation:

pi is the ratio between a circle's circumference and diameter.
In other words,
C = pid = 2pir

Plug in your information:
64 = 2pir

64/(2pi) = (cancel(2pi)r)/cancel(2pi)

64/(2pi) = r

32/(pi) = r

r~~10.186