a) We need to remind ourselves that the area of a square is given by:
[tex]A=a^2[/tex]So now, let's plug into that formula the area that has been given, and solve for a:
[tex]\begin{gathered} a^2=4 \\ \\ a=\sqrt{4} \\ \\ a=2\:ft \end{gathered}[/tex]So, the length of each side is 2 ft
b) When we consider the perimeter, we can find the length of each side: in a quite straightforward way:
[tex]\begin{gathered} P=a+a+a+a \\ \\ P=4a \\ \\ 144=4a \\ \\ \frac{4a}{4}=\frac{144}{4} \\ \\ a=36\:yd \end{gathered}[/tex]And these are the answers
