ANSWER
3 square units
EXPLANATION
The given formula is
[tex]A=12s^2[/tex]
But
[tex] s = \frac{1}{2} [/tex]
We substitute the value of s into the formula to get;
[tex]A=12( \frac{1}{2} )^2[/tex]
[tex]A=12 \times \frac{1}{4}[/tex]
[tex]A=3 {units}^{2} [/tex]
The value of A in square units is
3
