Octagon
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(Redirected from Octagram)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Octagon_2.svg/220px-Octagon_2.svg.png)
An octagon or 8-gon is a polygon that has exactly 8 sides.
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]
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This shape is called an octagram. It has one regular octagon in the middle.
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The octagonal prism has 2 octagons in it: one on the top, and the other on the bottom.
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A non-regular octagon
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Making an octagon by folding paper