8. \( A=\pi r^{2} \) \( r= \)

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The formula \( A = \pi r^2 \) represents the area \( A \) of a circle in terms of its radius \( r \). If you want to solve for \( r \), you can rearrange the formula as follows: 1. Start with the equation: \[ A = \pi r^2 \] 2. Divide both sides by \( \pi \): \[ \frac{A}{\pi} = r^2 \] 3. Take the square root of both sides to solve for \( r \): \[ r = \sqrt{\frac{A}{\pi}} \] So, the radius \( r \) in terms of the area \( A \) is: \[ r = \sqrt{\frac{A}{\pi}} \]