What formula is used to calculate the surface area of a three-dimensional square?

The surface area of a three-dimensional square, often referred to as a cube when all sides are equal, can be calculated using the appropriate formula. In the context of a cube, all sides are of equal length, and the surface area is determined by considering all six faces of the cube.

For a cube, the surface area can be calculated using the formula 6 * (side length^2). In the provided choices, while none directly state this formula, the choice indicating Length x Width x Height represents the volume of a rectangular prism rather than the surface area.

Other choices focus on either the linear dimensions or the summation of dimensions without providing a means to calculate area adequately. Therefore, the correct concept related to surface area, although not precisely listed here, revolves around the cubic relationship of the dimensions.

Ultimately, in understanding surface areas, it's crucial to recall that length and width alone do not provide the total area of a three-dimensional object; instead, it requires the calculation of all dimensions and faces involved, which typically entails squaring the side lengths in a cube and factoring in the six faces.