-: POLYGON :-

OPEN and CLOSED figures

    In geometry , an open figure can be defined as a figure or shape whose line segments (or curves do not meet. It is a kind of an incomplete figure. They do not start and end at the same point.

  A closed figure can be defined as a figure or shape whose line segments (or curves)  meet or connected. It looks like a complete figure. They  start and end at the same point. 

  

OPEN FIGURE WITH LINE SEGMENTS 

CLOSED FIGURE WITH LINE SEGMENTS 

POLYGON

A simple closed figure with three or more line segments is called a polygon.

NO of sides  Name of polygon       

      3                  Triangle                    

      4                 Quadrilateral           

      5                 Pentagon

      

      6                   Hexagon

      

      7                   Heptagon

      

      8                    Octagon

      

     9                   Nonagon

    

   10                   Decagon

  

        REGULAR  POLYGON 

A polygon with equal sides and equal angles is called a regular polygon.