1-6 Classifying Polygons

A polygon is a closed plane figure with the following properties:

• Formed by 3 or more line segments called sides.

• Each side has EXACTLY two endpoints.
  
  

​A polygon is convex if no line that contains a side of the polygon contains a point in the interior.

(No sides intersect at any point other than the endpoints. Points all push outwards.

​​Convex Polygons

A polygon is concave if it is not convex.

(The figure has a section that dips inward.)

​​Concave Polygons

Polygons can be classified based on how many sides they have.
They first 10 have special names.

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Classifying Polygons

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