[tex]Area\ of\ a\ square; \\ \\ A=s^{2} \\ \\ Area=9 \\ \\ 9=s^{2}\ \ \ \ \ \ \ \ \ |Substitute\ Area\ to\ 9... \\ \\ \boxed{3\ cm.=s} \\ \\ \\ Perimeter\ of\ a\ square; \\ \\ P=4s \\ \\ P=4(3) \ \ \ \ \ \ \ \ \ \ |Substitute\ s\ to\ 3... \\ \\ \boxed{\boxed{Perimeter=12\ cm.}} \\ \\ Hope\ it\ Helps:) \\ Domini[/tex]
