Question

The radius of a circle is 9 millimeters. What is the circle's circumference?

Answer 1

Explanation:

56.52

C=2 * 3.14 * radius

Answer 2

56.6mm

Explanation:

Take the radius and double it to get the diameter

9mm * 2 = 18mm

Multiply the diameter by pi to get the circumference of the circle

18mm * 3.1415 = 56.547mm