Solving for Radius in an Area Formula

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Solve for $r$ in the equation $\pi * r^2 = 25$ .

$\frac{5}{\sqrt{\pi}}$

$\frac{5\sqrt{2}}{\sqrt{\pi}}$

5 $\sqrt{\pi}$

$\frac{25}{\pi}$

$\sqrt{25\pi}$

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