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Can you please help me

1 Answer

2 votes

The formula to find the area of a circle is


\begin{gathered} A=\pi r^2 \\ \text{ Where A is the area and} \\ r\text{ is the radius of the circle} \end{gathered}

So, in this case, you have


\begin{gathered} r=21ft \\ \text{ Because} \\ \text{radius =}\frac{\text{ diameter}}{2} \\ \text{radius =}(42ft)/(2) \\ \text{radius =}21ft \end{gathered}
\begin{gathered} A=\pi(21ft)^2 \\ A=\pi\cdot441ft^2 \\ A=1385.44ft^2 \end{gathered}

Therefore, the area of this circle is 1385.44 square feet.

User Mr Punch
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