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