Answer:
288 square units
Step-by-step explanation:
The formula for the area of a square when you know its diagonal is: [tex]\frac{1}{2} d^2[/tex]
So, since we know the half diagonal is 12, we need to multiply that by 2 to get the diagonal, which is 24.
Put 24 into the formula. [tex]\frac{1}{2} * 24^2[/tex]
Simplify the exponent. [tex]\frac{1}{2} * 576[/tex]
Finally, multiply. [tex]288[/tex]
