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