Radius of the circle

Question

The circumference of a circle is 62.8 in.  What is the radius?

Answer 1

The formula for the circumference of a circle is C = 2πr, so you can plug in the circumference and solve for the radius.

 

C = 2πr

62.8 = 2πr

31.4 = πr

10 = r

 

If you use 3.14 for π, then the radius of the circle is 10 inches.