Octagon

An octagon or 8-gon is a polygon that has exactly 8 sides.

 Regular octagon 
All sides of a regular octagon are the same length. Each corner is 135°. All corners added together equal 1080°.

 Area 
The amount of space a regular octagon takes up is

a is the length of one of its sides.

Another way to write it is

 Gallery 

Related pages
 Different types of polygons
 Hexagon
 Pentagon
 Square or quadrilateral
 Triangle

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