- In geometry, an
octadecagon (or octakaidecagon) or 18-gon is an eighteen-sided polygon. A
regular octadecagon has a Schläfli
symbol {18} and can be constructed...
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Pentadecagon – 15
sides Hexadecagon – 16
sides Heptadecagon – 17
sides Octadecagon – 18
sides Enneadecagon – 19
sides Icosagon – 20
sides Icosikaihenagon...
- hexakaidecagon) 16
heptadecagon (or heptakaidecagon) 17
Constructible polygon octadecagon (or octakaidecagon) 18
enneadecagon (or enneakaidecagon) 19 icosagon...
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Dodecagon Tridecagon Tetradecagon Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon Icosagon Hectogon Chiliagon Regular polygon Monogon Digon...
- hexadecagram, <16/7> Regular, {16/7}, r32 Isogonal, p16
Direct equiangular octadecagons, <18}, <18/2>, <18/3>, <18/4>, <18/5>, <18/6>, <18/7>, and <18/8>, have...
- {11} {12} {13} {14}
Image Name
Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon Icosagon ...n-gon Schläfli {15} {16} {17} {18} {19} {20}...
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Breakdance 2 - Six four-car hubs are
installed on the 25-metre (82 ft)
Octadecagon platform.
Breakdance 3 - The
dodecagonal platform is
reduced to 18-metre...
-
hexadecagon hexakaidecagon 17
heptadecagon heptakaidecagon septendecagon 18
octadecagon octakaidecagon 19
enneadecagon enneakaidecagon 20
icosagon 21 icosikaihenagon...
- 672 {3}
Edges 144
Vertices 18
Vertex figure Octacross Petrie polygon Octadecagon Coxeter groups C9, [37,4] D9, [36,1,1] Dual 9-cube
Properties convex...
-
Kelheim limestone rests on a three-tier base,
which is
designed as an
octadecagon. The
outer facade is
divided by 18
pillars with 18
colossal statues by...
