[math-fun] In[569]:= vertexSolidAngles["RhombicTriacontahedron"] // FullSimplify //Tally // tim

During evaluation of In[569]:= 8.60579 secs, 2 components Out[569]= {{π, 12}, {3π/5, 20}} I.e., 12 vertices have solid angle π. True or false: Four RTs with disjoint interiors can intersect at a point and fill a neighborhood of it. Can five with disjoint interiors intersect at one point? Six?? 6×⅗π < 4π. Question 2: How many vertices, edges, and faces has the Stella Octangula? --rwg