Johnson Solids (Page 1)

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(J17) Gyroelongated Square Dipyramid

Vertices:   10  (2[4] + 8[5]) Faces: 16  ({8 * 2} equilateral triangles) Edges: 24 Symmetry:   4-fold Antiprismatic  (D4v) (values below based on edge length = 1) Volume: (sqrt(2)+sqrt(4+3*sqrt(2)))/3     ≈1.42840450262774840053