Question: What is the area of a square with vertices at (1, 1), (1, 5), (5, 1), and (5, 5)?

Options:

1. 16
2. 20
3. 24
4. 25

Correct Answer: 25

Solution:

The area of a square is given by Area = side². The side length is 5 - 1 = 4, so Area = 4² = 16.