The area of a square can be easily calculated using a simple mathematical formula: Area = side × side or Area = side2. In the case of a square computer screen with each side measuring 21 inches, you would proceed as follows:
1. Start with the length of one side of the square, which is 21 inches.
2. Apply the formula:
Area = 21 inches × 21 inches
3. Now, perform the multiplication:
Area = 441 square inches
Therefore, the area of a square computer screen with sides measuring 21 inches is 441 square inches.
This measurement gives you an idea of the amount of display space you have available on your screen, allowing you to consider how it fits into your workspace or how it may affect your viewing experience.