Versi-Regular Polyhedra

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(Uniform #4) Tetrahemihexahedron
Vertices:  6  (6[4])
Faces:7  (4 equilateral triangles + 3 squares)
Edges:12
Symmetry:  Full Tetrahedral  (Td)
Dihedral Angle:  acos(sqrt(3)/3)    ≈54.735610317 degrees
Dual Solid:  Tetrahemihexacron
(values below based on edge length = 1)
Circumscribed Radius:  sqrt(2)/2    ≈0.70710678118654752440
Midscribed Radius:  1/2    0.5
Square Center Radius:  0
Triangle Center Radius:  sqrt(6)/6    ≈0.40824829046386301637


References:[1]Jean Paul Albert Badoureau, Mémoire sur les Figures Isocèles,
Journal de l'École polytechnique 49 (1881), 47-172.