A8 polytope

Orthographic projections
A₈ Coxeter plane

8-simplex

In 8-dimensional geometry, there are 135 uniform polytopes with A₈ symmetry. There is one self-dual regular form, the 8-simplex with 9 vertices.

Each can be visualized as symmetric orthographic projections in Coxeter planes of the A₈ Coxeter group, and other subgroups.

Symmetric orthographic projections of these 135 polytopes can be made in the A₈, A₇, A₆, A₅, A₄, A₃, A₂ Coxeter planes. A_k has [k+1] symmetry.

These 135 polytopes are each shown in these 7 symmetry planes, with vertices and edges drawn, and vertices colored by the number of overlapping vertices in each projective position.

#	Coxeter-Dynkin diagram Schläfli symbol Johnson name	Ak orthogonal projection graphs
		A8 [9]	A7 [8]	A6 [7]	A5 [6]	A4 [5]	A3 [4]	A2 [3]
1	t0{3,3,3,3,3,3,3} 8-simplex
2	t1{3,3,3,3,3,3,3} Rectified 8-simplex
3	t2{3,3,3,3,3,3,3} Birectified 8-simplex
4	t3{3,3,3,3,3,3,3} Trirectified 8-simplex
5	t0,1{3,3,3,3,3,3,3} Truncated 8-simplex
6	t0,2{3,3,3,3,3,3,3} Cantellated 8-simplex
7	t1,2{3,3,3,3,3,3,3} Bitruncated 8-simplex
8	t0,3{3,3,3,3,3,3,3} Runcinated 8-simplex
9	t1,3{3,3,3,3,3,3,3} Bicantellated 8-simplex
10	t2,3{3,3,3,3,3,3,3} Tritruncated 8-simplex
11	t0,4{3,3,3,3,3,3,3} Stericated 8-simplex
12	t1,4{3,3,3,3,3,3,3} Biruncinated 8-simplex
13	t2,4{3,3,3,3,3,3,3} Tricantellated 8-simplex
14	t3,4{3,3,3,3,3,3,3} Quadritruncated 8-simplex
15	t0,5{3,3,3,3,3,3,3} Pentellated 8-simplex
16	t1,5{3,3,3,3,3,3,3} Bistericated 8-simplex
17	t2,5{3,3,3,3,3,3,3} Triruncinated 8-simplex
18	t0,6{3,3,3,3,3,3,3} Hexicated 8-simplex
19	t1,6{3,3,3,3,3,3,3} Bipentellated 8-simplex
20	t0,7{3,3,3,3,3,3,3} Heptellated 8-simplex
21	t0,1,2{3,3,3,3,3,3,3} Cantitruncated 8-simplex
22	t0,1,3{3,3,3,3,3,3,3} Runcitruncated 8-simplex
23	t0,2,3{3,3,3,3,3,3,3} Runcicantellated 8-simplex
24	t1,2,3{3,3,3,3,3,3,3} Bicantitruncated 8-simplex
25	t0,1,4{3,3,3,3,3,3,3} Steritruncated 8-simplex
26	t0,2,4{3,3,3,3,3,3,3} Stericantellated 8-simplex
27	t1,2,4{3,3,3,3,3,3,3} Biruncitruncated 8-simplex
28	t0,3,4{3,3,3,3,3,3,3} Steriruncinated 8-simplex
29	t1,3,4{3,3,3,3,3,3,3} Biruncicantellated 8-simplex
30	t2,3,4{3,3,3,3,3,3,3} Tricantitruncated 8-simplex
31	t0,1,5{3,3,3,3,3,3,3} Pentitruncated 8-simplex
32	t0,2,5{3,3,3,3,3,3,3} Penticantellated 8-simplex
33	t1,2,5{3,3,3,3,3,3,3} Bisteritruncated 8-simplex
34	t0,3,5{3,3,3,3,3,3,3} Pentiruncinated 8-simplex
35	t1,3,5{3,3,3,3,3,3,3} Bistericantellated 8-simplex
36	t2,3,5{3,3,3,3,3,3,3} Triruncitruncated 8-simplex
37	t0,4,5{3,3,3,3,3,3,3} Pentistericated 8-simplex
38	t1,4,5{3,3,3,3,3,3,3} Bisteriruncinated 8-simplex
39	t0,1,6{3,3,3,3,3,3,3} Hexitruncated 8-simplex
40	t0,2,6{3,3,3,3,3,3,3} Hexicantellated 8-simplex
41	t1,2,6{3,3,3,3,3,3,3} Bipentitruncated 8-simplex
42	t0,3,6{3,3,3,3,3,3,3} Hexiruncinated 8-simplex
43	t1,3,6{3,3,3,3,3,3,3} Bipenticantellated 8-simplex
44	t0,4,6{3,3,3,3,3,3,3} Hexistericated 8-simplex
45	t0,5,6{3,3,3,3,3,3,3} Hexipentellated 8-simplex
46	t0,1,7{3,3,3,3,3,3,3} Heptitruncated 8-simplex
47	t0,2,7{3,3,3,3,3,3,3} Hepticantellated 8-simplex
48	t0,3,7{3,3,3,3,3,3,3} Heptiruncinated 8-simplex
49	t0,1,2,3{3,3,3,3,3,3,3} Runcicantitruncated 8-simplex
50	t0,1,2,4{3,3,3,3,3,3,3} Stericantitruncated 8-simplex
51	t0,1,3,4{3,3,3,3,3,3,3} Steriruncitruncated 8-simplex
52	t0,2,3,4{3,3,3,3,3,3,3} Steriruncicantellated 8-simplex
53	t1,2,3,4{3,3,3,3,3,3,3} Biruncicantitruncated 8-simplex
54	t0,1,2,5{3,3,3,3,3,3,3} Penticantitruncated 8-simplex
55	t0,1,3,5{3,3,3,3,3,3,3} Pentiruncitruncated 8-simplex
56	t0,2,3,5{3,3,3,3,3,3,3} Pentiruncicantellated 8-simplex
57	t1,2,3,5{3,3,3,3,3,3,3} Bistericantitruncated 8-simplex
58	t0,1,4,5{3,3,3,3,3,3,3} Pentisteritruncated 8-simplex
59	t0,2,4,5{3,3,3,3,3,3,3} Pentistericantellated 8-simplex
60	t1,2,4,5{3,3,3,3,3,3,3} Bisteriruncitruncated 8-simplex
61	t0,3,4,5{3,3,3,3,3,3,3} Pentisteriruncinated 8-simplex
62	t1,3,4,5{3,3,3,3,3,3,3} Bisteriruncicantellated 8-simplex
63	t2,3,4,5{3,3,3,3,3,3,3} Triruncicantitruncated 8-simplex
64	t0,1,2,6{3,3,3,3,3,3,3} Hexicantitruncated 8-simplex
65	t0,1,3,6{3,3,3,3,3,3,3} Hexiruncitruncated 8-simplex
66	t0,2,3,6{3,3,3,3,3,3,3} Hexiruncicantellated 8-simplex
67	t1,2,3,6{3,3,3,3,3,3,3} Bipenticantitruncated 8-simplex
68	t0,1,4,6{3,3,3,3,3,3,3} Hexisteritruncated 8-simplex
69	t0,2,4,6{3,3,3,3,3,3,3} Hexistericantellated 8-simplex
70	t1,2,4,6{3,3,3,3,3,3,3} Bipentiruncitruncated 8-simplex
71	t0,3,4,6{3,3,3,3,3,3,3} Hexisteriruncinated 8-simplex
72	t1,3,4,6{3,3,3,3,3,3,3} Bipentiruncicantellated 8-simplex
73	t0,1,5,6{3,3,3,3,3,3,3} Hexipentitruncated 8-simplex
74	t0,2,5,6{3,3,3,3,3,3,3} Hexipenticantellated 8-simplex
75	t1,2,5,6{3,3,3,3,3,3,3} Bipentisteritruncated 8-simplex
76