A triangle has an area of 25 square yards and a height of 10 yards. What is the length of the base?

The formula for the area of a triangle is:

Area = 1/2 * base * height

Given:
Area = 25 square yards
Height = 10 yards

25 = 1/2 * base * 10
25 = 5 * base
base = 25 / 5
base = 5

Therefore, the length of the base of the triangle is 5 yards.