Question

The radius of a circle is 1 mile. What is the circle's circumference?
Use 3.14 for π.

Answer 1

6.28 mile

Explanation:

Circumference of circle = 2 · π · r

π = 3.14

r = 1 mile

Let's solve

2 · 3.14 · 1 = 6.28 mile

So, the circumference is 6.28 mile

Answer 2

6.28

Explanation:

In order to find circumference, you must do c=π*d (pi multiplied by diameter).

Since radius is half of diameter, multiply 1*2, now that you have the diameter, multiply it by 3.14

2*3.14=6.28