Johnson Solids (Page 1)

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(J19) Elongated Square Cupola

Vertices:   20  (8[3] + {8 + 4}[4]) Faces: 18  (4 equilateral triangles + {4 * 3 + 1} squares     + 1 regular octagon) Edges: 36 Symmetry:   4-fold Pyramidal  (C4v) (values below based on edge length = 1) Volume: (9+8*sqrt(2))/3     ≈6.77123616632825346347