Polygons Name by Sides
regular polygons
3-sides
4-sides
5-sides
6-sides
7-sides
8-sides
9-sides
10-sides
Sides Name

3 Triangle

4 Quadrilateral

5 Pentagon

6 Hexagon

7 Heptagon

8 Octagon

9 Nonagon

10 Decagon

11 Undecagon
or               
-Hendecagon

12 Dodecagon
regular polygons chart
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definition of a Regular Polygon:  A polygon in which all
angles and sides are equal.
Polygons Name by Sides
Irregular Polygon?  Definition: Any polygon that is
not a regular polygon. A polygon whose sides are
not all the same length or whose interior angles do
not all have the same measure.
irregular polygon
Irregular Polygon
The figure to the left is pentagon because it has five
sides. But it is irregular because all the sides are not
equal length.
Square
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Regular polygons Chart
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