Global Information Lookup Global Information

Octadecagon information


Regular octadecagon
A regular octadecagon
TypeRegular polygon
Edges and vertices18
Schläfli symbol{18}, t{9}
Coxeter–Dynkin diagrams
Symmetry groupDihedral (D18), order 2×18
Internal angle (degrees)160°
PropertiesConvex, cyclic, equilateral, isogonal, isotoxal
Dual polygonSelf

In geometry, an octadecagon (or octakaidecagon[1]) or 18-gon is an eighteen-sided polygon.[2]

  1. ^ Kinsey, L. Christine; Moore, Teresa E. (2002), Symmetry, Shape, and Surfaces: An Introduction to Mathematics Through Geometry, Springer, p. 86, ISBN 9781930190092.
  2. ^ Adams, Henry (1907), Cassell's Engineer's Handbook: Comprising Facts and Formulæ, Principles and Practice, in All Branches of Engineering, D. McKay, p. 528.

and 15 Related for: Octadecagon information

Request time (Page generated in 0.5297 seconds.)

Octadecagon

Last Update:

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...

Word Count : 824

9

Last Update:

plane-vertex alongside an equilateral triangle and a regular 18-sided octadecagon (3.9.18), and as such, it is one of only nine polygons that are able...

Word Count : 4744

Polygon

Last Update:

hexakaidecagon) 16 heptadecagon (or heptakaidecagon) 17 Constructible polygon octadecagon (or octakaidecagon) 18 enneadecagon (or enneakaidecagon) 19 icosagon...

Word Count : 4287

List of polygons

Last Update:

pentakaidecagon 16 hexadecagon hexakaidecagon 17 heptadecagon heptakaidecagon 18 octadecagon octakaidecagon 19 enneadecagon enneakaidecagon 20 icosagon 21 icosikaihenagon...

Word Count : 281

Euclidean plane

Last Update:

{11} {12} {13} {14} Image Name Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon Icosagon ...n-gon Schläfli {15} {16} {17} {18} {19} {20}...

Word Count : 1963

List of mathematical shapes

Last Update:

Dodecagon Tridecagon Tetradecagon Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon Icosagon Hectogon Chiliagon Regular polygon Monogon Digon...

Word Count : 3577

Equiangular polygon

Last Update:

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...

Word Count : 2652

List of regular polytopes

Last Update:

[13] D14, [14] Dynkin Image Name Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon Icosagon  ...p-gon  Schläfli {15} {16} {17} {18} {19} {20}...

Word Count : 5294

Befreiungshalle

Last Update:

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...

Word Count : 880

1 32 polytope

Last Update:

Faces 40320 {3} Edges 10080 Vertices 576 Vertex figure t2{35} Petrie polygon Octadecagon Coxeter group E7, [33,2,1], order 2903040 Properties convex...

Word Count : 641

2 31 polytope

Last Update:

{33} Cells 20160 {32} Faces 10080 {3} Edges 2016 Vertices 126 Vertex figure 131 Petrie polygon Octadecagon Coxeter group E7, [33,2,1] Properties convex...

Word Count : 588

3 21 polytope

Last Update:

Faces 4032 {3} Edges 756 Vertices 56 Vertex figure 221 polytope Petrie polygon octadecagon Coxeter group E7, [33,2,1], order 2903040 Properties convex...

Word Count : 1025

Uniform polytope

Last Update:

Dodecagon Tridecagon Tetradecagon Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon Icosagon Schläfli {12} t{6} {13} {14} t{7} {15} {16} t{8}...

Word Count : 2947

Hessian polyhedron

Last Update:

Coxeter diagram Faces 72 2{4}3 Edges 216 {} Vertices 54 Petrie polygon Octadecagon van Oss polygon {6} Shephard group M3 = 3[3]3[4]2, order 1296 Dual polyhedron...

Word Count : 738

York engine sheds and locomotive works

Last Update:

45-foot turntable and space for 18 locomotives. this was an 18 sided octadecagon and was 172 feet in diameter. It was designed by NER architect Thomas...

Word Count : 3651
PDF Search Engine © AllGlobal.net