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.
Article
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.