Answer:
The height of the triangle = 16 yards
The base of the triangle = 21 yards
Explanations:
Let the height of the triangle be h
Height = h
The base is 5 yards longer than the height
Base = h + 5
The area = 168 square yards


Solve the resulting quadratic equation:

The height of the triangle = 16 yards
The base of the triangle = 16 + 5
The base of the triangle = 21 yards