Question

What’s the circumference of a circle with radius of 18 in.

Answer 1

C = 36 pi or approximately 113.04

Explanation:

The circumference of a circle is given by

C = 2*pi*r

C = 2*pi*18

C = 36 pi

We can approximate pi by 3.14

C = 36*3.14

C =113.04