Portion of a solid that lies between two parallel planes cutting this solid.
For other uses, see Frustum (disambiguation).
Set of pyramidal right n-gonal frustums
Examples: right pentagonal and square frustums (n = 5 and n = 4)
Faces
n isosceles trapezoids, 2 regular n-gons
Edges
3n
Vertices
2n
Symmetry group
Cnv, [1,n], (*nn)
Dual polyhedron
asymmetric bipyramid
Properties
convex
Net
Example: net of right trigonal frustum (n = 3)
In geometry, a frustum (Latin for 'morsel');[a] (pl.: frusta or frustums) 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;[3] otherwise, it is an oblique frustum.
In a truncated cone or truncated pyramid, the truncation plane is not necessarily parallel to the cone's base, as in a frustum.
If all its edges are forced to become of the same length, then a frustum becomes a prism (possibly oblique or/and with irregular bases).
^Clark, John Spencer (1895). Teachers' Manual: Books I–VIII. For Prang's complete course in form-study and drawing, Books 7–8. Prang Educational Company. p. 49.
^Fontaine, Michael (2010). Funny Words in Plautine Comedy. Oxford University Press. pp. 117, 154. ISBN 9780195341447.
^Kern, William F.; Bland, James R. (1938). Solid Mensuration with Proofs. p. 67.
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In geometry, a frustum (Latin for 'morsel'); (pl.: frusta or frustums) is the portion of a solid (normally a pyramid or a cone) that lies between two parallel...
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parallel surfaces. They may be more generally described as a mix between a frustum and a prismatoid. The object was first described by Gómez-Gálvez et al...
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a nose radius of 2.34 cm, a forward frustum half-angle of 10.4°, an inter-frustum radius of 14.6 cm, aft frustum half angle of 6°, and an axial length...
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any need for different bearings. A bevel gear is shaped like a conical frustum (a right circular cone with most of the tip cut off). When two bevel gears...
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