- geometry, an
icosagon or 20-gon is a twenty-sided polygon. The sum of any
icosagon's interior angles is 3240 degrees. The
regular icosagon has Schläfli...
-
genus four,
whose fundamental polygon is a
regular hyperbolic twenty-sided
icosagon, with an area
equal to 12 π {\displaystyle 12\pi } by the Gauss-Bonnet...
-
Heptadecagon – 17
sides Octadecagon – 18
sides Enneadecagon – 19
sides Icosagon – 20
sides Icosikaihenagon - 21
sides Icosikaidigon - 22
sides Icositrigon...
- right-hand (卐). The
compact swastika can be seen as a
chiral irregular icosagon (20-sided polygon) with
fourfold (90°)
rotational symmetry. Such a swastika...
- octagon, enneagon, decagon, hendecagon, dodecagon, ... enneadecagon,
icosagon, triacontagon, ... chiliagon,
myriagon trilogy, tetralogy, pentalogy, hexalogy...
-
surface of
genus four, with a
domain that is a
regular hyperbolic 20-sided
icosagon. By the Gauss-Bonnet theorem, the area of this
fundamental polygon is equal...
- number, and as such
counts the
number of
maximal independent sets in an
icosagon.
There are 277 ways to tile a 3 × 8
rectangle with integer-sided squares...
-
heptakaidecagon 18
octadecagon octakaidecagon 19
enneadecagon enneakaidecagon 20
icosagon 21
icosikaihenagon icosihenagon 22
icosikaidigon icosidigon icosadigon...
-
octadecagon (or octakaidecagon) 18
enneadecagon (or enneakaidecagon) 19
icosagon 20
icositrigon (or icosikaitrigon) 23 The
simplest polygon such that the...
-
stellated dodecahedron,
whose fundamental polygon is a
regular hyperbolic icosagon, with an area of 12 π {\displaystyle 12\pi } (by the Gauss-Bonnet theorem)...
