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en.wikipedia.org/wiki/Decagon
In particular this is true for regular polygons with evenly many sides, in which case the parallelograms are all rhombi. For the regular decagon, m=5, and it can be divided into 10 rhombs, with examples shown below. This decomposition can be seen as 10 of 80 faces in a Petrie polygon projection plane of the 5cube.
en.wikipedia.org/wiki/List_of_polygons
List of polygons. Jump to navigation Jump to search. A pentagon is a five sided polygon. A regular pentagon has 5 equal edges and 5 equal angles. In geometry, a polygon / ˈ p ɒ l ɪ ɡ ɒ n / is traditionally a ...
www.reference.com/math/name10sidedpolygon5b39985da917f66d
A polygon is a twodimensional plane figure with straight sides. These sides or segments do not intersect at any point. The parts of a polygon include the side, vertex, diagonal, interior angle and exterior angle.
www.reference.com/math/tensidedpolygon4627eca1427dd667
A 10sided polygon is known as a decagon. A polygon is a closed plane figure with many sides that connect at its endpoints. Two sides meet to form a vertex, and the sides never cross each other.
www.calculatorsoup.com/calculators/geometryplane/polygon.php
A regular polygon is a polygon that is both equiangular and equilateral. All sides are equal length placed around a common center so that all angles between sides are also equal. When the number of sides, n, is equal to 3 it is an equilateral triangle and when n = 4 is is a square.
www.answers.com/Q/What_are_the_110_polygons
9 Sided Polygon Nonagon/Enneagon. 10 Sided Polygon Decagon. What are the shapes called with the 'agon' at the end? Polygons. Polygons. Polygons. Polygons. share: Why is a octagon not a polygons?
www.mathsisfun.com/geometry/polygons
A polygon is a plane shape with straight sides. Is it a Polygon? Polygons are 2dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up). Polygon (straight sides) Not a Polygon (has a curve) ... Think Decagon has 10 sides,
mathcentral.uregina.ca/QQ/database/QQ.09.96/rosa1.html
After about 6 sides mathematicians usually refer to these polygons as ngons. So your 13 sided polygon I would call a 13gon. Cheers, Walter and Harley Go to Math Central. To return to the previous page use your browser's back button.
www.math.com/tables/geometry/polygons.ht
Convex  a straight line drawn through a convex polygon crosses at most two sides.Every interior angle is less than 180°. Concave  you can draw at least one straight line through a concave polygon that crosses more than two sides.At least one interior angle is more than 180°.
faculty.kutztown.edu/schaeffe/Tutorials/General/Polygons.html
For polygons with 3 through 20 sides, simply add "gon" to the prefixes at the left (although a trigon is more commonly called a triangle and a tetragon, a quadrilateral!).

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