Simplest Canonical Polyhedra of Each Symmetry Type

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Simplest Canonical Polyhedron with S4 Symmetry
(2 of 2)
Vertices:  12  (4[3] + 4[3] + 4[4])
Faces:10  ({2 opposite * 2} acute triangles + 2 rhombi
    + {2 opposite * 2} irregular pentagons)
Edges:20  (4 short + 8 medium + 8 long)
Symmetry:  2-fold Rotoreflection  (S4)
Dual Solid:  Simplest S4 (1 of 2)
(values below based on edge-scribed radius = 1)
Short Edge (4):  sqrt(root[49*(x^4)−168*(x^3)+256*(x^2)−224*x+64])    ≈0.68771944768279816176
Medium Edge (8):  sqrt(root[(x^4)+8*(x^3)−96*(x^2)−992*x+1600])    ≈1.2002216716148992436
Long Edge (8):  sqrt(root[49*(x^4)−168*(x^3)    
    +704*(x^2)−1536*x+1024])    
≈1.2620247991472689016
Edge-scribed Radius:  1
Volume:sqrt(root[321489*(x^4)−268458624*(x^3)    
    +55702536192*(x^2)+966693224448*x    
    −14541836517376])    
≈3.1279371698095168201