Question

The radius of a circle is 6 millimeters. What is the circle's circumference?

Answer 1

37.68 mm

Explanation:

The circumference is given by

C = 2* pi*r

The radius is 6 mm

C = 2 * pi *6

C = 12 pi

Approximating pi by 3.14

C = 12* 3.14

C =37.68