The side length of square AA is 1212 yards. The ratios of side length between AA and BB is 4:9. To determine the side length of BB, we need to compare the ratios: (4/9)=(1212/x) where x is the side length of BB. If you solve for x, then you have: x= (1212)*(9/4) = 2727 yards A square has 4 equal sides so once you have the side length, you can solve for the perimeter, which is the total length of all the sides. Perimeter = 4 * 2727 = 10,908 yards.