A polygon is a closed, two dimensional figure composed of line segments. Squares, hexagons, rectangles and concave octagons are all polygons.

en.wikipedia.org/wiki/List_of_polygons

In geometry, a polygon /ˈpɒlɪɡɒn/ is traditionally a plane figure that is bounded
by a finite ... To construct the name of a polygon with more than 20 and less than
100 edge...

mathcentral.uregina.ca/qq/database/qq.09.96/rosa1.html

Subject: Polygons. From: Manuel. Elementary level (6th Grade) Student Question
. What do you call a 13 sided polygon? Is there a list of the different names?

www.mathsisfun.com/geometry/polygons.html

A regular polygon has all angles equal and all sides equal, otherwise it is ...
Names of Polygons. If it is a Regular Polygon... Name, Sides, Shape, Interior
Angle.

www.math.com/tables/geometry/polygons.htm

Polygon Names ... Name. n. N-gon. 3. Triangle. 4. Quadrilateral. 5. Pentagon. 6 ...
Names for other polygons have been proposed.

faculty.kutztown.edu/schaeffe/tutorials/general/polygons.html

Naming a polygon by its number of sides requires that we know the ... For more
than 20 sides, we "construct" the name by using so-called combining prefixes: ...

mathforum.org/dr.math/faq/faq.polygon.names.html

What do you call an 11-sided polygon? A 14-sided polygon? Can you give me a
list of names of polygons?

www.henryanker.com/Math/Geometry/Polygon_Names_Set_01.swf

Score Mr. Anker Tests, Geometry Which of the polygon names matches the figure
to the right? triangle quadrilateral hexagon pentagon Which of the polygon ...

www.factacular.com/subjects/Polygon_Names

Facts, quizzes and trivia about Polygon Names, 5, Pentagon, 6, Hexagon and
more.

www.aaamath.com/geo318x1.htm

Names of Polygons. Name, Sides, Angles. Triangle, 3, 3. Quadrilateral, 4, 4.
Pentagon, 5, 5. Hexagon, 6, 6. Heptagon, 7, 7. Octagon ... What type of polygon is
it?