TITLE: Finding circumference without using $\pi$
QUESTION [16 upvotes]: If the area of a circle is $254.34\ldots\text{ cm}^2$ it has a diameter of $18\text{ cm}$, is it possible to find the circumference without using or making the irrational constant Pi ($\pi=3,1415926535\ldots)$ in any way at all, and if it is possible, how?
To find the area of $254.34$ I used $\pi$ as $3.14$ in shorthand. The formula you give should allow me to find the Circumference as $56.52\text{ cm}$ (as this also uses $\pi$ as 3.14)
Sorry! There was a mistake in the question!

REPLY [3 votes]: The relation between area of a circle and its circunference can be seen by dissecting it, according to your tastes, as an onion, or as a pizza.