Regular Higher Genus Toroids

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Heptagonal Dodecahedron (type E) (form 2)
form 2
Vertices:  28  (28[3])
Faces:12  ({4 * 3} nonconvex heptagons)
Edges:42  (11 different lengths)
Symmetry:  2-fold Dihedral  (D2)
(values below based on integer coordinates)
Edge 1 (2):  4
Edge 2 (8):  sqrt(17)    ≈4.1231056256176605498
Edge 3 (4):  4*sqrt(2)    ≈5.6568542494923801952
Edge 4 (4):  2*sqrt(17)    ≈8.2462112512353210996
Edge 5 (2):  4*sqrt(5)    ≈8.9442719099991587856
Edge 6 (4):  3*sqrt(17)    ≈12.369316876852981649
Edge 7 (6):  6*sqrt(5)    ≈13.416407864998738178
Edge 8 (4):  18
Edge 9 (4):  33
Edge 10 (2):  16*sqrt(5)    ≈35.777087639996635143
Edge 11 (2):  26*sqrt(2)    ≈36.769552621700471269
Volume:4160  [EXACT]