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mario62 [17]
3 years ago
14

Please Help i have a test the next day

Mathematics
2 answers:
Delicious77 [7]3 years ago
5 0

if the diameter is 4 units, then its radius is half that, or 2.

\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} r= 2 \end{cases}\implies A=\pi 2^2\implies A=4\pi \implies \stackrel{\pi =3.14~\hfill }{A\approx 12.57}

earnstyle [38]3 years ago
3 0

Answer:

12.6 ft²

Step-by-step explanation:

The formula for the area of a circle is

A = πr²

If d = 4 ft,

   r = 2 ft

  A = 3.14 × 2² = 3.14 × 4 = 12.6 ft²

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