Question

(maybe) Useless question #3 (or 4)!

Answer 1

Answer:

The circumference of a circle with radius $\pi$ is $2\pi^2$ units.

Step-by-step explanation:

The circumference of a circle is defined by the equation $C=2\pi r$, where $C$ stands for the circumference and $r$ stands for the radius.

Substituting the variables with the known values, we get the following:

$C=2\pi(\pi)\\C=2\pi^2$

Answer 2

It answer is 2pie x radius