The Small Stellated Dodecahedron

A non-convex polyhedron bounded by twelve intersecting pentagrams; five meeting at each vertex.

The small stellated dodecahecahedron is one of the four Kepler-Poinsot Star Polyhedra, and is also the first stellation of the dodecahedron.

Vertex
Symbol
Wythoff
Symbol
No. of
Vertices
No. of
Edges
No. of
Faces
Symmetry
Group
Dual Polyhedron
(5/2)5 5 | 2 5/2 12 30 12 A5×C2 Great
Dodecahedron
Edge
Inter-Radius
= 1 + root5   Edge
Circum-Radius
= root(10 + 2root5)
root5
Edge
In-Radius
= root(10 + 2root5)   Edge
Dodecahedral Edge
= 3 + root5
2