Question

Given a circle with a diameter of 4, what is the circumference?

Answer 1

12,566 cm

Explanation:

The formula for finding the circumference of a circle may be used:

`C=2 pi r`, where r is the radius and equal to half of the diameter

So in this case, `C = 2 pi (2) = 4 pi cm`,
which can be calculated to 12,566 cm.