Johnson Solids (Page 3)
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(J48)
Gyroelongated Pentagonal Birotunda
Vertices:
40 ({10 * 2}[4] + {10 * 2}[5])
Faces:
52 ({10 * 4} equilateral triangles + {10 + 2} regular pentagons)
Edges:
90
Symmetry:
5-fold Dihedral (D5)
(values below based on edge length = 1)
Volume:
(45+17*sqrt(5)+5*sqrt(2
*(sqrt(10*(65+29*sqrt(5)))
−1−sqrt(5))))/6
≈20.584813811796399002