Set of bifrustums or Truncated bipyramids | |
---|---|
Faces | 2 n-gons, 2n trapezoids |
Edges | 5n |
Vertices | 3n |
Symmetry group | D_{nh} |
Dual polyhedron | Elongated dipyramids |
Properties | convex |
An n-agonal bifrustum is a polyhedron composed of three parallel planes of n-agons, with the middle plane largest and usually the top and bottom congruent.
It can be constructed as two congruent frustum combined across a plane of symmetry, and also as a bipyramid with the two polar vertices truncated.
Forms
- Triangular bifrustum - 6 trapezoids, 2 triangles, dual elongated triangular dipyramid
- Square bifrustum - 8 trapezoids, 2 squares, dual elongated square dipyramid
- Pentagonal bifrustum - 10 trapezoids, 2 pentagons, dual elongated pentagonal dipyramid
- Hexagonal bifrustum - 12 trapezoids, 2 hexagons, dual elongated hexagonal dipyramid
- ...
- n-agonal bifrustum - 2n trapezoids, 2 n-agons, duals elongated dipyramid
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