Mathematically, an edge refers to a strip-shaped protrusion on an object, or a part where two planes in different directions are connected. The side length refers to each side of a cuboid and a cube. The length of three sides intersecting at a vertex is called the length, width and height of a cuboid.

The formula related to the side length of the cube: volume = side length × side length × side length; The surface area of a cube = side length × side length ×6, and the sum of side lengths = side length × 12.