Define63+prism

__**Prism:**__ polyhedron that consists of a polygonal region and its translated image on a parallel plane. __**Right Prism:**__ prism which all the lateral faces are rectangles. __**Oblique Prism:**__ has at least one nonrectangular lateral face.


 * Study the lateral faces of prisms.
 * Solve problems using the diagonal measure of a right prism