Answer:
30.9
Step-by-step explanation:
Each of the corners is a quarter-circle which sum up to a circle. The diameter is 12 so the radius is 6. The area of the circle is pi * r^2 or 36pi. 36pi= 113.09. the entire area of the square is 144. If we subtract the numbers, we get the shaded area which is 30.9.
