Johnson Solids (Page 3)
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(J42)
Elongated Pentagonal Orthobirotunda
Vertices:
40 ({20 + 10 * 2}[4])
Faces:
42 ({10 * 2} equilateral triangles + {5 * 2} squares
+ {10 + 2} regular pentagons)
Edges:
80
Symmetry:
5-fold Prismatic (D5h)
(values below based on edge length = 1)
Volume:
(45+17*sqrt(5)
+15*sqrt(5+2*sqrt(5)))/6
≈21.529734779187537646