Question 203833
Recall, the perimeter of a square formula is {{{P=4s}}} where "s" is the length of the side.



{{{P=4s}}} Start with the given equation



{{{12=4s}}}  Plug in P=12 (the given perimeter)



{{{12/4=s}}} Divide both sides by 4 to isolate 's'



{{{s=3}}} Divide and rearrange the equation.



So the length of the side of the square is 3 inches.



Now simply plug this value into the area formula {{{A=s^2}}} to get {{{A=(3)^2=9}}}. 



So the area of the square is 9 square inches.