vertices | 30 edges | 60 faces | 40 (40 triangles)

1 (60 edges)

10 sqrt(3)≈17.3205

1/sqrt(2)≈0.707107

1/2 = 0.5

(assuming unit edge length)

five octahedra

five cubes

icosahedral group

amphichiral | equilateral | stellation