Johnson Solids (Page 3)
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(J53)
Biaugmented Pentagonal Prism
Vertices:
12 (2[3] + {4 * 2 + 2}[4])
Faces:
13 ({4 + 2 * 2} equilateral triangles + {2 + 1} squares
+ 2 regular pentagons)
Edges:
23
Symmetry:
2-fold Pyramidal (C2v)
(values below based on edge length = 1)
Volume:
sqrt(257+90*sqrt(5)
+24*sqrt(10*(5+2*sqrt(5))))/12
≈2.1918819213799986057