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This is a list of two-dimensional geometric shapes in Euclidean ... Hexagon – 6 sides ... Decagon – 10 sides; Hendecagon – 11 sides; Dodecagon – 12 sides;
The regular hendecagon has Dih 11 symmetry, order 22. Since 11 is a prime number there is one subgroup with dihedral symmetry: Dih 1, and 2 cyclic group symmetries: Z 11, and Z 1. These 4 symmetries can be seen in 4 distinct symmetries on the hendecagon. John Conway labels these by a letter and group order. [11]
These segments are called its edges or sides, and the points where two of the edges meet are the polygon's vertices (singular: vertex) or corners. The word polygon comes from Late Latin polygōnum (a noun), from Greek πολύγωνον ( polygōnon/polugōnon ), noun use of neuter of πολύγωνος ( polygōnos/polugōnos , the masculine ...
The elements of a polytope can be considered according to either their own dimensionality or how many dimensions "down" they are from the body.
The constant width of these shapes allows their use as coins that can be used in coin-operated machines. For instance, the United Kingdom has made 20-pence and 50-pence coins in the shape of a regular Reuleaux heptagon. [5] The Canadian loonie dollar coin uses another regular Reuleaux polygon with 11 sides. [6]
A triangulated polygon with 11 vertices: 11 sides and 8 diagonals form 9 triangles. Every simple polygon can be partitioned into non-overlapping triangles by a subset of its diagonals. When the polygon has n {\displaystyle n} sides, this produces n − 2 {\displaystyle n-2} triangles, separated by n − 3 {\displaystyle n-3} diagonals.
Prisms over the hendecagrams {11/3} and {11/4} may be used to approximate the shape of DNA molecules. [6] An 11-pointed star from the Momine Khatun Mausoleum. Fort Wood, now the base of the Statue of Liberty in New York City, is a star fort in the form of an irregular 11-point star. [7]
Lists of shapes cover different types of geometric shape and related topics. They include mathematics topics and other lists of shapes, such as shapes used by drawing ...