orthotetrahedron
regular tetrahedron
disphenoid
tetrahedron
tetrahedral
dihedron
bialtitude
geometrically
rectahedron
deltahedron
apeirohedron
hypergeometry
Penrose triangle
snub
equilateral triangle
prism
trifan
geometrics
decahedron
rhombidodecahedron
triangular hebesphenorotunda
square pyramid
great cubicuboctahedron
Boerdijk-Coxeter helix
triradius
rectangular
enneahedron
trefoil
triforce
pentadodecahedron
truncated tetrahedron
regular icosahedron
5-cell
peritrigonal
orthorhombic
scalene triangle
regular octahedron
trigonal
block
cube
600-cell
face-centered
triangular
pung
retrosnub
subsimplex
regular hexahedron
sigmoidicity
semilunate
polyhedrous