# Octagonal prism

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In geometry, the **octagonal prism** is the sixth in an infinite set of prisms formed by square sides and two regular polygon caps.

If faces are all regular, it is a semiregular polyhedron.

In optics octagonal prisms are used to generate flicker free images in movie projectors.

## See also

- Set of prisms
- Triangular prism
- Cube (square-capped prism)
- Pentagonal prism
- Hexagonal prism

## External links

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