A rectangular prism has six faces or sides that are quadrilaterals, and they are arranged so that the figures meet at eight corners or vertices. The places where two sides meet are called edges, and rectangular prisms have 12 of them. The individual faces may be square or rectangular.
If at least eight of the edges making up the prism are equal in length, the shape may also be called a square prism, although "rectangular prism" is still correct. Another name for this shape is "cuboid". Cuboids that have all 12 edges equal in length are called cubes. In that particular case, all six faces are squares.