Answer:
half the diagonal is given as 7 yards, the full diagonal would be 7 x 2 = 14 yards.
The formula for the length of a side of a square using just the diagonal is:
Side = √2(d/2)
Side = √2 (14/2)
Side = √2(7)
Side = 9.9 yards.
The area of a square is S^2
Area = 9.9^2
Area = 98.01
Area = 98.0 Yards^2