How many square feet are in one square yard?

One square yard is a unit of area that is defined as a square with each side measuring one yard. Since one yard equals three feet, to determine the area in square feet, you calculate the area of the square as follows:

1. Each side of the square yard is 3 feet.

2. The area is calculated by multiplying the length of one side by itself (length × width). Therefore, the area in square feet is:

(3 \text{ feet} \times 3 \text{ feet} = 9 \text{ square feet})

Thus, there are 9 square feet in one square yard, making this the correct answer. Understanding the conversion between yards and feet and how area is calculated in terms of squares is key here.