en.wikipedia.org/wiki/Polygon

In elementary geometry, a polygon /ˈpɒlɪɡɒn/ is a plane figure that is bounded
by a finite chain of straight line segments closing in a loop to form a closed chain
or circui...

www.reference.com/math/three-sided-polygon-called-cfd1b251ec5cec9c

A polygon with three sides is called a triangle. All triangles consist of three lines
that are not collinear and three angles. Polygons can have any number of sides,
...

www.skillsyouneed.com/num/polygons.html

A three-sided polygon is a triangle. There are ... A triangle with only acute internal
angles is called an acute triangle. ... A five-sided shape is called a pentagon.

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 ... Example: A 35-sided polygon is called a "triacontakaipentagon." ...

www.answers.com/Q/What_is_a_three_sided_figure_called

What is a closed figure with three or more sides called? ... What is is a 3-sided
figure called? ... In geometry (math) a 3 -sided linear figure is called a triangle.

www.freemathhelp.com/feliz-polygons.html

Each corner of a polygon where two sides intersect is called a vertex of the
polygon. For example, a triangle is a polygon with 3 sides. There are also three ...

mathforum.org/sanders/geometry/GP03Polygons.html

Polygons. Many of the shapes we see around us have mathematical names.
Those made of straight lines are called polygons. A polygon is a straight-sided ...

www.mathopenref.com/polygon.html

Polygon definition and properties. ... A 5-sided polygon is called a pentagon for
example. There are some that wish to name ... Triangle, 3 sides. Quadrilateral, 4
...

study.com/academy/lesson/what-is-a-polygon-definition-shapes-angles.html

May 16, 2015 ... For example, a triangle has three sides, and a quadrilateral has four sides. So,
any shape that ... An 11-sided shape can be called an 11-gon.

math.stackexchange.com/questions/5205/what-are-4-sided-shapes-called-again

Sep 22, 2010 ... ... 4 sided shapes called again? Like how triangles are 3 sided shapes, octagons
are 8 sided shapes, ... What are the 4 sided ones called then?