Edges 22 Vertex configuration 4(3.4)
2(3.4)
2x2(3) | Vertices 10 Symmetry group C2v | |
 | ||
Type Johnson
J85 - J86 - J87 Faces 2x2+2x4 triangles
2 squares | ||
In geometry, the sphenocorona is one of the Johnson solids (J86).
A Johnson solid is one of 92 strictly convex polyhedra that have regular faces but are not uniform (that is, they are not Platonic solids, Archimedean solids, prisms or antiprisms). They were named by Norman Johnson, who first listed these polyhedra in 1966.
The sphenocorona is one of the elementary Johnson solids that do not arise from "cut and paste" manipulations of the Platonic and Archimedean solids.
Formulae
The following formulae for volume and surface area can be used if all faces are regular, with edge length a: