Category
page 1Deltahedra

tetrahedron
thumb|A tetrahedron.
deltahedron
thumb|upright=1.6|The eight convex deltahedra. First row: regular tetrahedron, triangular bipyramid, [[regular octahedron, pentagonal bipyramid. Second row: gyroelongated square bipyramid, regular icosahedron, triaugmented triangular prism, snub disphenoid.]]
A deltahedron is a polyhedron whose faces are all equilateral triangles. The deltahedron was named by Martyn Cundy, after the Greek capital letter delta resembling a triangular shape Δ.
regular icosahedron
Platonic solid
regular octahedron
Platonic solid
triangular bipyramid
bipyramid over a triangle
pentagonal bipyramid
third of the infinite set of face-transitive bipyramids
triakis icosahedron
Catalan polyhedron
great icosahedron
Kepler–Poinsot polyhedron
regular tetrahedron
Platonic solid
gyroelongated square bipyramid
Johnson solid
snub disphenoid
solid that has only equilateral triangles as faces
triaugmented triangular prism
Johnson solid