Medial deltoidal hexecontahedron

{{Short description|Polyhedron with 60 faces}}

{{Uniform polyhedra db|Uniform dual polyhedron stat table|rDD}}

File:Medial deltoidal hexecontahedron.stl

In geometry, the medial deltoidal hexecontahedron is a nonconvex isohedral polyhedron. It is the dual of the rhombidodecadodecahedron. Its 60 intersecting quadrilateral faces are kites.

Proportions

The kites have two angles of \arccos(\frac{1}{6})\approx 80.405\,931\,773\,14^{\circ}, one of \arccos(-\frac{1}{8}+\frac{7}{24}\sqrt{5})\approx 58.184\,446\,117\,59^{\circ} and one of \arccos(-\frac{1}{8}-\frac{7}{24}\sqrt{5})\approx 141.003\,690\,336\,13^{\circ}. The dihedral angle equals \arccos(-\frac{5}{7})\approx 135.584\,691\,402\,81^{\circ}. The ratio between the lengths of the long and short edges is \frac{27+7\sqrt{5}}{22}\approx 1.938\,748\,901\,931\,75. Part of each kite lies inside the solid, hence is invisible in solid models.

References

  • {{Citation | last1=Wenninger | first1=Magnus | author1-link=Magnus Wenninger | title=Dual Models | publisher=Cambridge University Press | isbn=978-0-521-54325-5 | mr= 730208| year=1983}}