In this lesson, we'll learn words we can use to talk about more kinds of polygons.

  • pentagon
  • hexagon
  • septagon
  • octagon
  • nonagon
  • decagon
  • simple polygon
  • complex polygon
  • convex polygon
  • concave polygon
  • regular polygon 
  • irregular polygon

Shapes with More than 4 Sides

Polygons with more than four sides also have special names. For example, a polygon with five sides, like the picture below, is called a pentagon.

pentagon

Below are the names of polygons with between 5 and 10 sides. 

Number of Sides 5 6 7 8 9 10
Name pentagon hexagon septagon octagon nonagon decagon

Categorizing Polygons


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