Pentagonal dipyramid
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Pentagonal dipyramid | |
---|---|
Type | Dipyramid and Johnson J_{12} - J_{13} - J_{14} |
Faces | 10 triangles |
Edges | 15 |
Vertices | 7 |
Face configuration | V4.4.5 |
Symmetry group | D_{5h} |
Dual | pentagonal prism |
Properties | convex, face-transitive, (deltahedron) |
In geometry, the pentagonal dipyramid (or bipyramid) is third of the infinite set of face-transitive dipyramids.
The set of dipyramids is the dual of the uniform prisms.
It is also a Johnson solid (J_{13}), constructed of regular polygons. It can be seen as two pentagonal pyramids (J_{2}) connected along their bases.
As a Johnson solid, it is a convex deltahedron. Although it is face-transitive, it is not a Platonic solid because some vertices have four faces meeting and others have five faces.
The Johnson solid 13 is made of 10 equilateral triangles.
External links
- Weisstein, Eric W., "Pentagonal dipyramid" from MathWorld.
- Weisstein, Eric W., "Pentagonal dipyramid" from MathWorld.
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