Common Core Math Vocabulary

Polygon - Definition with Examples

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What is a polygon? 
In geometry, a polygon can be defined as a flat, two-dimensional closed shape whose sides are straight. It does not have curved sides. 
 

Here are a few examples of polygons.

Polygon Geometry Two-Dimensional 2D shape
 

Polygons can be of two types:

Regular Polygons – Polygons that have equal sides and angles are regular polygons. 
 

Here are a few examples of regular polygons. 

Regular Polygons Geometry Two-Dimensional 2D shape

Irregular Polygons – Polygons with unequal sides and angles are irregular polygons.
 

Here are a few examples of irregular polygons. 

Irregular Polygons Geometry Two-Dimensional 2D shape

  Fun Facts

  • Quadrilaterals are also polygons.
 

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All Polygons are closed figures,
As count of sides gets bigger,
The names of polygons differ!
 

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Show you child pictures of different polygons. Ask them to count the number of sides they have and tell them its name. You can further explain how these polygons have been named basis the number of sides they have. 
 

related math vocabulary Related math vocabulary

 

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