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How do I calculate the square footage of a circle?

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\begin{gathered} To\text{ find the square footage of a circle we only need the radius, because the square footage is the area} \\ \\ A=\pi r^2 \\ \\ \text{ That's how we calculate it} \end{gathered}


\begin{gathered} To\text{ find the square footage of a circle we only need the radius, because the square footage is the area} \\ \\ A=\pi r^2 \\ \\ \text{ That's how we calculate it} \end{gathered}
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