Regular Higher Genus Toroids

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Heptagonal Dodecahedron (type E) (form 4)
form 4
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 (6):  2*sqrt(5)    ≈4.4721359549995793928
Edge 2 (4):  2*sqrt(6)    ≈4.8989794855663561964
Edge 3 (2):  4*sqrt(2)    ≈5.6568542494923801952
Edge 4 (4):  8*sqrt(2)    ≈11.313708498984760390
Edge 5 (8):  10*sqrt(3)    ≈17.3205080756887729353
Edge 6 (4):  4*sqrt(21)    ≈18.330302779823360026
Edge 7 (2):  6*sqrt(13)    ≈21.633307652783935759
Edge 8 (4):  14*sqrt(3)    ≈24.248711305964282109
Edge 9 (4):  10*sqrt(6)    ≈24.494897427831780982
Edge 10 (2):  26
Edge 11 (2):  46
Volume:11936  [EXACT]