Final answer:
The area of the square with sides of 9 meters each is 81 square meters. The array (if referring to area needed) is also 81 square meters with each side of the square being 9 meters.
Step-by-step explanation:
The area of a square is calculated by multiplying the length of one side by itself. Since the given square has sides of 9 meters each, the calculation for the area will be: 9 meters × 9 meters = 81 square meters.
To answer how large the array will need to be, we are essentially looking for the size of a space that can accommodate certain items or people. Assuming that by 'array' we mean an area that is needed, the area is expressed as 81 square meters. If we are asked for the side length for a square with the same area, it would again be 9 meters, since we are describing a square with the original given dimensions.