Octagon
An octagon or 8-gon is a shape with 8 sides and 8 corners.
Regular octagon
All sides of a regular octagon are the same length. Each corner is 135deg. All corners added together equal 1080deg.
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
8