Answer
The area of a triangle is approximately $4$ square feet.
Work Step by Step
The area of a triangle is calculated using Heron's formula, where $s$ is equal to half the perimeter of the triangle. The area of the triangle is given by
$\begin{align}
& A=\sqrt{s\left( s-a \right)\left( s-b \right)\left( s-c \right)} \\
& \\
\end{align}$
where
$\begin{align}
& s=\frac{1}{2}\left( a+b+c \right) \\
& s=\frac{1}{2}\left( 4+4+2 \right)=5 \\
\end{align}$
By substituting the values of s and a, b, c we get,
$\begin{align}
& A=\sqrt{5\left( 5-4 \right)\left( 5-4 \right)\left( 5-2 \right)} \\
& A=\sqrt{15}=3.87 \\
& A\simeq 4 \\
\end{align}$
