The perimeter P of a square can be calculated using the formula;
[tex]P=4l[/tex]Where;
P = perimeter
l = length
Given that;
The length of one side is 13cm;
[tex]l=13\operatorname{cm}[/tex]Substituting into the fomula, we have;
[tex]\begin{gathered} P=4l=4\times13\operatorname{cm} \\ P=52\operatorname{cm} \end{gathered}[/tex]Therefore, the perimeter of the square is 52cm