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/Polygon

In elementary geometry, a polygon /ˈpɒlɪɡɒn/ is a plane figure that is bounded
by a finite ..... Self-intersecting polygons[edit]. The area of a self-intersecting
polygon ca...

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A plane shape (two-dimensional) with straight sides. Examples: triangles,
rectangles and pentagons. (Note: a circle is not a polygon because it has a
curved ...

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May 16, 2015 ... Polygons are everywhere! In this lesson, you will learn what they are and what
they look like. You will also learn about a special class of...

www.merriam-webster.com/dictionary/polygon

Define polygon: mathematics : a flat shape that has three or more straight lines
and angles — polygon in a sentence.

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Polygon definition, a figure, especially a closed plane figure, having three or
more, usually straight, sides. See more.

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A polygon is a closed shape with straight sides. Rectangles, triangles, hexagons,
and octagons are all examples of polygons.

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Polygons are one of the most all-encompassing shapes in geometry. From the
simple triangle up through squares, rectangles, trapezoids, to dodecagons and ...

www.thefreedictionary.com/polygon

A closed plane figure bounded by three or more line segments. [Late Latin
polygōnum, from Greek polugōnon, from neuter of Greek polugōnos, polygonal :
polu- ...

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A polygon can be defined (as illustrated above) as a geometric object "consisting
of a number of points (called vertices) and an equal number of line segments ...