What is the formula for calculating the area of a square?

The correct answer is based on the geometric properties of a square. A square is defined as a four-sided polygon (a quadrilateral) with equal sides. The area of a square is calculated by multiplying one side by itself, which can also be expressed as length multiplied by width since, in a square, the length and width are the same.

When determining the area of a square, you multiply a single dimension (the length of one side) by itself. This results in the formula: Area = Side x Side. This is consistent with the choice that states Length x Width since, in the case of a square, both the length and width are the same measurement.

The other options do not reflect the specific characteristics of a square. For instance, the formula that suggests multiplying width and height applies to rectangles and not squares. Similarly, the expression involving 2 times the sum of length and width pertains to calculating the perimeter of a rectangle, rather than its area.