Johnson Solids (Page 2)

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(J31) Pentagonal Gyrobicupola

Vertices:   20  ({10 * 2}[4]) Faces: 22  (10 equilateral triangles + 10 squares + 2 regular pentagons) Edges: 40 Symmetry:   5-fold Antiprismatic  (D5v) (values below based on edge length = 1) Volume: (5+4*sqrt(5))/3     ≈4.6480906366663862619