Question

Please Help i have a test the next day

Answer 1

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}`

Answer 2

12.6 ft²

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