Note that many of those listed above are regularpolygons, meaning that they have sides that are equal length and congruent angles. There are also star-shaped regular polygons.
Since any two dimensional enclosed path of line segments is a polygon, there are an infinite number of kinds of them.
Polygons are named after the number of sides which range upwards from 3 - without limit.
They may be regular (if all their sides are congruent AND all their angles are as well) or irregular.
They may be convex (a line joining any two points on the boundary of the polygon is wholly inside the boundary) or concave.
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