👉 Cuboids are rectangular solids with at least three dimensions. They can be divided into two types, namely cuboidal and rectangular. A cube is a type of cuboid where all sides are equal in length, while a rectangular prism has four rectangular faces. In geometry, a cuboid is a 3D shape that has six faces: five square (length, width, height) and one triangular (base). The base may be either a rectangle or a triangle.