Self-Intersecting Truncated Quasi-Regular Duals

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Tetradyakis Hexahedron
Vertices:  20  (8[6] + 6[8] + 6[8])
Faces:48  (obtuse triangles)
Edges:72  (24 short + 24 medium + 24 long)
Symmetry:  Full Octahedral  (Oh)
Dihedral Angle:  acos(−5/7)    ≈135.584691403 degrees
Dual Solid:  Cubitruncated Cuboctahedron
(values below based on unit-edge-length Cubitruncated Cuboctahedron)
Short Edge (24):  2*(sqrt(6)−sqrt(3))    ≈1.4348778704286016093
Medium Edge (24):  3*sqrt(6)    ≈7.3484692283495342946
Long Edge (24):  2*(sqrt(3)+sqrt(6))    ≈8.3630811007041107834
[8]-Vertex Radius (6):  3*(sqrt(2)−1)    ≈1.2426406871192851464
[6]-Vertex Radius (8):  sqrt(3)    ≈1.73205080756887729353
[8]-Vertex Radius (6):  3*(1+sqrt(2))    ≈7.2426406871192851464
Edge-scribed Radius:  sqrt(6)/2    ≈1.2247448713915890491
Inscribed Radius:  3*sqrt(7)/7    ≈1.1338934190276816816