Rearrange the formula A=pir^2 for r.

Question

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.