Final answer:
The area of a square with a side length of 9 cm is 81 cm^2.
Step-by-step explanation:
To find the area of a square, you need to square the length of one side. In this case, the side length is 9 cm, so you can simply multiply 9 cm by itself.
Therefore, the area of the square is 81 cm2.
Learn more about Calculating the area of a square