# How do you solve this: A=3.14r^2 for r3.14 stands for pie, I don't know how to spell pie for math. Algebra 2

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To solve for r, we need to get anything that doesn't look like r to the other side.

`A=pi r^2` divide both sides by `pi` (spelled pi)

`A/pi=r^2` take square roots of both sides

`sqrt{A/pi}=r` we've solve for r!

**The solution is `r=sqrt{A/pi}` .**

Area=pie*r2

r2=Area/pie

r=sqrroot(Area/pie).