In geometry, a frustum[a] (from the Latin for "morsel"; plural: frusta or frustums) is the portion of a solid (normally a pyramid or a cone) that lies between two parallel planes cutting this solid. In the case of a pyramid, the base faces are polygonal, 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.
Set of pyramidal right n-gonal frustums
Pentagonal frustum.svgUsech kvadrat piramid.png
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
convex asymmetric right n-gonal bipyramid
Properties
convex
Net
Net of right trigonal frustum.png
Example: net of right trigonal frustum (n = 3)
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).
In computer graphics, the viewing frustum is the three-dimensional region which is visible on the screen. It is formed by a clipped pyramid; in particular, frustum culling is a method of hidden surface determination.
In the aerospace industry, a frustum is the fairing between two stages of a multistage rocket (such as the Saturn V), which is shaped like a truncated cone.
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Answer:
In geometry, a frustum[a] (from the Latin for "morsel"; plural: frusta or frustums) is the portion of a solid (normally a pyramid or a cone) that lies between two parallel planes cutting this solid. In the case of a pyramid, the base faces are polygonal, 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.
Set of pyramidal right n-gonal frustums
Pentagonal frustum.svgUsech kvadrat piramid.png
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
convex asymmetric right n-gonal bipyramid
Properties
convex
Net
Net of right trigonal frustum.png
Example: net of right trigonal frustum (n = 3)
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).
In computer graphics, the viewing frustum is the three-dimensional region which is visible on the screen. It is formed by a clipped pyramid; in particular, frustum culling is a method of hidden surface determination.
In the aerospace industry, a frustum is the fairing between two stages of a multistage rocket (such as the Saturn V), which is shaped like a truncated cone.