Friday, March 29, 2013

Polygons

Polygon

Polygon is a closed figure with line segments.

Names of polygons

3 sided polygon : Triangle
4 sided polygon : Quadrilateral
5 sided polygon : Pentagon
6 sided polygon : Hexagon
7 sided polygon : Heptagon
8 sided polygon : Octagon
9 sided polygon : Nonagon
10 sided polygon : Decagon

Main points to remember

The sum of interior angles of a polygon is ( n - 2 ) 180.

The sum of the exterior angles of any polygon is 360.

The No. of sides of a regular polygon = Sum of exterior angles/one exterior angle = 360/one exterior angle.  



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