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An octagon

An octagon or 8-gon is .

Regular octagon[change | change source]

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

Area[change | change source]

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[change | change source]

Related pages[change | change source]