Given Data:
The total area of the square is: A=169 square meters
Let 'a' be the length of a side of the square. The expression to calculate the area of a square is,
[tex]A=a^2[/tex]Substitute values in the above expression.
[tex]\begin{gathered} 169=a^2 \\ a^2=169 \\ a=\sqrt[]{169} \\ a=13\text{ meter} \end{gathered}[/tex]Thus, the length of one side of the square is 13 meter.