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The regular decagon has Dih 10 symmetry, order 20. There are 3 subgroup dihedral symmetries: Dih 5, Dih 2, and Dih 1, and 4 cyclic group symmetries: Z 10, Z 5, Z 2, and Z 1. These 8 symmetries can be seen in 10 distinct symmetries on the decagon, a larger number because the lines of reflections can either pass through vertices or edges.
A pentagon is a five-sided polygon. A regular pentagon has 5 equal edges and 5 equal angles. ... 10: deca-20: icosa-30: triaconta-1: hena-11: ... Shape; References
This is a list of two-dimensional geometric shapes in Euclidean and other geometries. ... Decagon – 10 sides; Hendecagon – 11 sides; Dodecagon – 12 sides;
A polytope is a geometric object with flat sides, which exists in any general number of dimensions. The following list of polygons, polyhedra and polytopes gives the names of various classes of polytopes and lists some specific examples.
A regular decagram is a 10-sided polygram, represented by symbol {10/n}, containing the same vertices as regular decagon.Only one of these polygrams, {10/3} (connecting every third point), forms a regular star polygon, but there are also three ten-vertex polygrams which can be interpreted as regular compounds:
Some ten-sided dice (often called 'Percentile Dice') are sold in sets of two where one is numbered from 0 to 9 and the other from 00 to 90 in increments of 10, thus making it impossible to misinterpret which one is the tens and which the units die. Ten-sided dice may also be marked 1 to 10 when a random number in this range is desirable.
The elements of a polytope can be considered according to either their own dimensionality or how many dimensions "down" they are from the body.
There are infinitely many non-similar shapes of icosahedra, ... (2 sets of 10 sides = 20). 10-sided trapezohedron (2 sets of 10 sides = 20). Johnson solids.