4 Quadrilateral

5 Pentagon

6 Hexagon

7 Heptagon

8 Octagon

9 Nonagon

10 Decagon

11 Undecagon

or

-Hendecagon

12 Dodecagon

angles and sides are equal.

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

The figure to the left is pentagon because it has five

sides. But it is irregular because all the sides are not

equal length.

sides. But it is irregular because all the sides are not

equal length.

Square

Regular polygons Chart

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