Answer:
[tex]3[/tex]
Step-by-step explanation:
[tex]\sqrt{12} =3.46[/tex] (2 decimal places)
If you want to arrange the tiles into a square, you will need 3.46 in each row/column.
This is physically impossible, hence you round it down to 3.
(If you round it up, you won't have enough tiles since [tex]4*4=16[/tex])
Thus, the square area will be [tex]3*3=9[/tex]
Tiles left: [tex]12-9=3[/tex]
