Answer:
98
Step-by-step explanation:
If half the diagonal is 7 yd, then the full diagonal is 14 yd.
If we call the side length s, then using Pythagorean theorem:
c² = a² + b²
(14)² = s² + s²
196 = 2s²
s² = 98
The area of a square is s², so:
A = s²
A = 98
The area is 98 yd².
