The Hexagonal Prism
The hexagonal prism is a 3D uniform polyhedron bounded by 2 hexagonal faces and 6 squares. It has 18 edges and 12 vertices. It is the extrusion of the hexagon into 3D.
Attaching a triangular cupola to a hexagonal prism produces the elongated triangular cupola (J18), a Johnson solid. Attaching a second triangular cupola produces either the elongated triangular orthobicupola (J35) or the elongated triangular gyrobicupola (J36), depending on whether the second cupola is aligned or rotated with respect to the first, respectively.
Projections
In order to be able to identify the hexagonal prism in various projections of 4D objects, it is useful to know how it appears from various viewpoints. The following are some of the commonlyencountered views:
Projection  Envelope  Description 

Regular hexagon  Hexagoncentered parallel projection. 

Rectangle  Parallel projection centered on a vertical edge. 

Rectangle  Squarecentered parallel projection. 

Hexagon  Vertexcentered parallel projection. 
Coordinates
The Cartesian coordinates of the hexagonal prism, centered on the origin and having edge length 2, are:
 (±√3, ±1, ±1)
 (0, ±2, ±1)
Occurrences
The hexagonal prism occurs as cells in the following 4D uniform polytopes:
 The runcitruncated 5cell;
 The omnitruncated 5cell;
 The runcitruncated tesseract;
 The runcitruncated 16cell;
 The omnitruncated tesseract;
 The runcitruncated 24cell;
 The omnitruncated 24cell;
 The runcitruncated 600cell;
 The omnitruncated 120cell.