# Normal plane

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A **normal plane** may refer to

- The plane perpendicular to the tangent vector of a space curve; see [Frenet–Serret formulas](/source/Frenet%E2%80%93Serret_formulas).
- One of the planes containing the [normal vector](/source/Normal_vector) of a surface; see [Normal plane (geometry)](/source/Normal_plane_(geometry)).
- A term involving gears; see [list of gear nomenclature](/source/List_of_gear_nomenclature).

## See also

- [Normal bundle](/source/Normal_bundle)
- [Normal section](/source/Normal_section)

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Adapted from the Wikipedia article [Normal plane](https://en.wikipedia.org/wiki/Normal_plane) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Normal_plane?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.