Explanation:
so, the 1 yard is split into 6 equal parts.
each small square has therefore an area of 1/6 × 1/6 yard² = 1/36 yard²
the shaded area is 4×3 = 12 small squares large.
is area is therefore
12 × 1/36 = 1/3 yard²
since 1 yard = 3 ft, 1 × 1 = 1 yard² = 3 × 3 ft² = 9 ft².
and 1/3 yard² = 1/3 × 9 ft² = 3 ft²
so, whatever dimension you need.
the area is
1/3 yard² = 3 ft²