Question

Rearrange the formula A=pir^2 for r.

r= square root Api
r= square root A/pi
r= square root pi/A
r= square root A/pi

Answer 1

To rearrange the formula \( A = \pi r^2 \) for \( r \):

1. Start with the original formula:
\[
A = \pi r^2
\]

2. Divide both sides by \( \pi \):
\[
\frac{A}{\pi} = r^2
\]

3. Take the square root of both sides to solve for \( r \):
\[
r = \sqrt{\frac{A}{\pi}}
\]

Therefore, the correct rearranged formula for \( r \) is:
\[
r = \sqrt{\frac{A}{\pi}}
\]

So the correct answer from your options is:
- **r = square root A/pi**.