Images. n=4: Tetrahedron -Platonic Solid and n=5: Triangular bipyramid (Triangular Dipyramid) -Johnson solid J₁₂ and their Dual Polyhedrons

[url=http://dmccooey.com/polyhedra/Tetrahedron.html]Tetrahedron[/url]
[url=https://en.wikipedia.org/wiki/Triangular_bipyramid]Triangular Bipyramid[/url] or [url=http://dmccooey.com/polyhedra/TriangularDipyramid.html]Triangular Dipyramid[/url]
– Roman Chijner

Information: Images. n=4: Tetrahedron -Platonic Solid and n=5: Triangular bipyramid (Triangular Dipyramid) -Johnson solid J₁₂ and their Dual Polyhedrons