A tea bag can be modeled by the following square pyramid with a base edge of s= 4 centimeters and a height of l= 5 centimeters.
We are asked to find the surface area of the pyramid, \textcolor{darkorange}{S_\text{tea bag}}.
\begin{gathered}
\textcolor{darkorange}{S_\text{tea bag}}=\textcolor{darkviolet}{B}+\dfrac{1}{2}{\color{#FF0000}{P}}{\color{#009600}{\ell}}
\end{gathered}
Here, B stands for the area of the base. Since the base is a square with a side length of s=4 centimeters, the area of the base is B=4^2=16 square centimeters. The variable P is the perimeter of the base. This tells us that P=4* 4= 16 centimeters. Now, let's substitute the values into the formula for \textcolor{darkorange}{S_\text{tea bag}}.
