For this case we have that by definition, the area of a square is given by:
[tex]A = l ^ 2[/tex]
Where "l" represents the side of the square.
In this case we have to:
[tex]l = 12mm[/tex]
So, the area is given by:
[tex]A = (12mm) ^ 2\\A = 144mm ^ 2[/tex]
Thus, the area of a square whose side is 12mm, is given by: [tex]144mm ^ 2[/tex]
Answer:
[tex]A = 144mm ^ 2[/tex]
