Use the formula below to find the surface area of the square pyramid in the image,
[tex]\begin{gathered} A=l^2+2(l*h) \\ l\rightarrow\text{ length of a side of the square} \\ h\rightarrow\text{ slant height of one of the triangular lateral faces} \end{gathered}[/tex]
Therefore, in our case,
[tex]\begin{gathered} l=16,h=13 \\ \Rightarrow A=16^2+2*16*13=672 \end{gathered}[/tex]
Thus, the answer is 672in^2
