Answer: 10 yards x 10 yards
Explanation:
80 + 120 = 200 yards (this is the perimeter of the figure); 80 x 120 = 9,600 yards^2 or yards squared.
100 + 100 = 200 yards (perimeter); 100 x 100 = 10,000 yards^2 or yards squared.
Note: You might think this is a square, which is true, but a square is a rectangle. There could also be other answers to this problem.