Johnson Solids (Page 1)
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(J20)
Elongated Pentagonal Cupola
Vertices:
25 (10[3] + {10 + 5}[4])
Faces:
22 (5 equilateral triangles + {5 * 3} squares
+ 1 regular pentagon + 1 regular decagon)
Edges:
45
Symmetry:
5-fold Pyramidal (C5v)
(values below based on edge length = 1)
Volume:
(5+4*sqrt(5)+15*sqrt(5
+2*sqrt(5)))/6
≈10.018254161271326637