Solid geometry deals with three dimensional objects. A geometric solid has length, width and height which is defined as follows.

Definition

A geometric solid is a region of spaces enclosed by planes and curved surfaces. Such as prisms, pyramids, spheres, cylinders, and cones. If the solid is enclosed by polygons it is called polyhedrons. The polygons are called faces. The segment which is the intersection point of any two faces of a polyhedron is called an edge. The intersection point of three or more edges is called vertex.