Question

The diameter of a circle is 4 millimeters. What is the circle's circumference?

Answer 1

C=0.125m

Explanation:

C = 2
`\pi`r= (2r)
`\pi` = d
`\pi` = 0.004·
`\pi` = 0.125m

Answer 2

4pi millimeters.

Assuming pi = 3.14159, we can approximate the diameter to be 12.56636mm

Explanation:

To get the circumference of a circle, just multiply the diameter by pi