Answer :
Answer: 9km^2
Explanation: Since this is a square, we can divide the perimeter by 4 to see what each side length is.
12/4= 3
Now do lengthXwidth to get the area. 3x3=9
Explanation: Since this is a square, we can divide the perimeter by 4 to see what each side length is.
12/4= 3
Now do lengthXwidth to get the area. 3x3=9