Final answer:
To find the area of a square, multiply the length of one side by itself. The area of a square with each side measuring 15 feet is 225 square feet (15 ft x 15 ft).
Step-by-step explanation:
The question asks to find the area of a square with a side length of 15 feet. To calculate the area of a square, we use the formula Area = side × side, which in this case is Area = 15 ft × 15 ft. Therefore, the area is 225 ft². The correct answer to the question is A. 225 ft².