Enneadecagon
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Enneadecagon | |
---|---|
Rank | 2 |
Type | Regular |
Notation | |
Coxeter diagram | x19o (![]() ![]() ![]() |
Schläfli symbol | {19} |
Elements | |
Edges | 19 |
Vertices | 19 |
Vertex figure | Dyad, length 2cos(π/19) |
Measures (edge length 1) | |
Circumradius | |
Inradius | |
Area | |
Angle | |
Central density | 1 |
Number of external pieces | 19 |
Level of complexity | 1 |
Related polytopes | |
Army | Enneadecagon |
Dual | Enneadecagon |
Conjugate | 8 total |
Abstract & topological properties | |
Flag count | 38 |
Euler characteristic | 0 |
Orientable | Yes |
Properties | |
Symmetry | I2(19), order 38 |
Convex | Yes |
Nature | Tame |
The enneadecagon is a polygon with 19 sides. A regular enneadecagon has equal sides and equal angles.
A circle with radius 3 centered at the center of an enneadecagon of unit edge length intersects its sides. This is related to the fact that .
Stellations[edit | edit source]
- 2-enneadecagram
- 3-enneadecagram
- 4-enneadecagram
- 5-enneadecagram
- 6-enneadecagram
- 7-enneadecagram
- 8-enneadecagram
- 9-enneadecagram
External links[edit | edit source]
- Bowers, Jonathan. "Regular Polygons and Other Two Dimensional Shapes".
- Wikipedia contributors. "Enneadecagon".