Symmetric Canonical Self-Dual Hexahedra

2 total:  2 

This is the only one with C2 symmetry

This is the only one with 5 edge lengths

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Self-Dual Hexahedron #2 (canonical)
Vertices:  6  (4[3] + 2[4])
Faces:6  (2 isosceles triangles + 2 scalene triangles + 2 irregular tetragons)
Edges:10  (5 different lengths)
Symmetry:  2-fold Cyclic  (C2)
(values below based on edge-scribed radius = 1)
Edge 1 (2):  sqrt(2*(2*sqrt(2+sqrt(5))−1−sqrt(5)))    ≈1.3268564934032578372
Edge 2 (1):  2*sqrt(sqrt(2*(5*sqrt(5)−11)))    ≈1.5499241426618984256
Edge 3 (4):  sqrt(2*(sqrt(2*(29+13*sqrt(5)))−4−2*sqrt(5)))    ≈2.1468989045199718192
Edge 4 (2):  sqrt(2*(sqrt(2*(sqrt(5)−1))−1+sqrt(5)))    ≈2.3699665537786124076
Edge 5 (1):  2*sqrt(sqrt(2*(1+sqrt(5))))    ≈3.1900089648953263896
Edge-scribed Radius:  1
Volume:8*(1+sqrt(5)−sqrt(2+sqrt(5)))/3    ≈3.1410585339421265229