Question

Circumference of circles

Answer 1

Explanation:

The circle's circumference is modeled by the equation C=2πr. R is the readius of the circle, and pi is the symbol for the number 3.1419...... and it's infinite. So if C=2π（2）, the answer for the circumference of a circle with a radius of 2 km would be 4π km, or approximately 12.57 km.

Answer 2

C = 12.56 km

Explanation:

Remember C = 2πr

C = 2(3.14)(2)

C = 12.56

And we have our final answer!