frustum
Sign in to saveIn geometry, a ; or frustums), often incorrectly spelled as frustrum or frustrums, is the portion of a solid (normally a pyramid or a cone) that lies between two parallel planes cutting the solid. In the case of a pyramid, the base faces are polygonal and the side faces are trapezoidal. A right frustum is a right pyramid or a right cone truncated perpendicularly to its axis; otherwise, it is an oblique frustum.
Wikidata facts
- Subclass of
- convex polyhedron
- Part of
- solid figure
- Image
- Pentagonal frustum.svg
Show 5 more facts
- Commons category
- Frustums
- Stack Exchange tag
- stackoverflow.com/tags/frustum
- different from
- truncated cone
- described by source
- Encyclopædia Britannica 11th edition
- maintained by WikiProject
- WikiProject Mathematics
Sources (2)
via Wikidata · CC0
~5 min read
Encyclopedic overview
9 sectionsContents
- Elements, special cases, and related concepts
- Formulas
- Volume
- Surface area
- Examples
- See also
- Notes
- References
- External links
In geometry, a ; or frustums), often incorrectly spelled as frustrum or frustrums, is the portion of a solid (normally a pyramid or a cone) that lies between two parallel planes cutting the solid. In the case of a pyramid, the base faces are polygonal and the side faces are trapezoidal. A right frustum is a right pyramid or a right cone truncated perpendicularly to its axis; otherwise, it is an oblique frustum.
In a truncated cone or truncated pyramid, the truncation plane is necessarily parallel to the cone's base, as in a frustum.
Excerpted from Wikipedia’s “frustum” article, available under the CC BY-SA 4.0 licence.