**Surface area**is the sum of the

**areas**of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. We can also label the length (l), width (w), and height (h) of the prism and use the

**formula**, SA=2lw+2lh+2hw, to find the

**surface area**.

In this way, what is the surface area of a square?

In words, the

**surface area**of a cube is the**area**of the six squares that cover it. The**area**of one of them is a*a, or a^{2}. Since these are all the same, you can multiply one of them by six, so the**surface area**of a cube is 6 times one of the sides squared.**Surface Area**of a Rectangular Prism = 2ab + 2bc + 2ac.How do you calculate the surface area of a box?

The width, height, and length of a

**box**can all be different. If they are the same, then the**box**will become a perfectly square**box**. The volume, or amount of space inside a**box**is h × W × L. The outside surface**area of a box**is 2(h × W) + 2(h × L) + 2(W × L)