Sphenocorona
| Sphenocorona | |
|---|---|
| Type | Johnson J85 - J86 - J87 |
| Faces | 2x2+2x4 triangles 2 squares |
| Edges | 22 |
| Vertices | 10 |
| Vertex configuration | 4(33.4) 2(32.42) 2x2(35) |
| Symmetry group | C2v |
| Dual polyhedron | - |
| Properties | convex |
| Net | |
In geometry, the sphenocorona is one of the Johnson solids (J86).
It is one of the elementary Johnson solids that do not arise from "cut and paste" manipulations of the Platonic and Archimedean solids.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
Formulae
The following formulae for volume and surface area can be used if all faces are regular, with edge length a:[1]
References
- ^ Stephen Wolfram, "Sphenocorona" from Wolfram Alpha. Retrieved July 21, 2010.
External links
- Weisstein, Eric W., "Johnson Solid" from MathWorld.
- Weisstein, Eric W., "Sphenocorona" from MathWorld.