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Diagram LabelValueUnitsfeetfeetRadius of the Pool CoverDiameter of the Pool CoverCircumference of the Pool CowerArea of the Pool Coverfeetsquare feet

User Smudge
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\begin{gathered} r\colon\text{ radius} \\ d\colon\text{ diameter} \\ \\ \text{ the radius is half of the diameter.} \\ r=(18)/(2) \\ \\ r=9\text{ feet} \end{gathered}
\text{ the diameter is 18 feets}
\begin{gathered} C\colon\text{ circumfence} \\ C=2\pi r \\ C=2\pi\cdot9 \\ C=18\pi\text{ feet} \end{gathered}
\begin{gathered} A\colon\text{ area} \\ A=r^2\pi \\ A=9^2\pi \\ A=81\pi\text{ feet} \end{gathered}

User Brandon Tiqui
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