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

Sep 10, 2015

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, $C = 2 \pi \left(2\right) = 4 \pi c m$,
which can be calculated to 12,566 cm.