Regular Higher Genus Toroids

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Heptagonal Dodecahedron (type C) (form 4)
form 4
Vertices:  28  (28[3])
Faces:12  ({6 * 2} nonconvex heptagons)
Edges:42  (8 different lengths)
Symmetry:  3-fold Dihedral  (D3)
(values below based on integer coordinates)
Edge 1 (3):  50
Edge 2 (6):  14*sqrt(34)    ≈81.633326527834206592
Edge 3 (6):  100
Edge 4 (6):  108
Edge 5 (6):  150
Edge 6 (3):  30*sqrt(59)    ≈230.43437243605824527
Edge 7 (6):  40*sqrt(34)    ≈233.23807579381201883
Edge 8 (6):  84*sqrt(19)    ≈366.14751125741657839
Volume:6169500  [EXACT]