Small stellapentakis dodecahedron

In geometry, the small stellapentakis dodecahedron is a nonconvex isohedral polyhedron. It is the dual of the truncated great dodecahedron. It has 60 intersecting triangular faces.

Proportions
The triangles have two acute angles of $$\arccos(\frac{1}{2}+\frac{1}{5}\sqrt{5})\approx 18.699\,407\,085\,149^{\circ}$$ and one obtuse angle of $$\arccos(\frac{1}{10}-\frac{2}{5}\sqrt{5})\approx 142.601\,185\,829\,70^{\circ}$$. The dihedral angle equals $$\arccos(\frac{-24-5\sqrt{5}}{41})\approx 149.099\,125\,827\,35^{\circ}$$. Part of each triangle lies within the solid, hence is invisible in solid models.