The document defines different types of 3D geometric solids including polyhedrons, which are solids made up of polygonal faces that meet at edges and vertices. It specifies that prisms are polyhedrons with congruent, polygon bases and tops connected by parallelogram lateral faces, listing cubes, cuboids, and cylinders as types of prisms. Cubes are defined as having six square faces meeting at each vertex, while cuboids have six quadrilateral faces and triangular prisms have a triangular base and translated copy connected by three joining faces.

2.  Each of these solids is made up of polygonal
regions which are called its faces. These faces meet
at edges which are line segments and the edges
meet at vertices which are points. Such solids are
called polyhedrons.
These are non polyhedrons
These are polyhedrons

3.  We say that a prism is a polyhedron whose
base and top are congruent polygons and
whose other faces ,that is, lateral faces are
parallelograms in shape.
The main types of prism are:
 Cube
 Cuboid
 Cylinder

4.  Three dimensional solid object bounded by
six square faces, facets or sides, with three
meeting at each vertex.

5.  a cuboid is a convex polyhedron bounded by
six quadrilateral faces, whose polyhedral
graph is the same as that of a cube.

6.  a triangular prism is a three-sided prism; it
is a polyhedron made of a triangular base,
a translated copy, and 3 faces joining
corresponding sides.