Johnson Solids (Page 1)

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(J15) Elongated Square Dipyramid

Vertices:   10  ({8 + 2}[4]) Faces: 12  (8 equilateral triangles + 4 squares) Edges: 20 Symmetry:   4-fold Prismatic  (D4h) (values below based on edge length = 1) Volume: (3+sqrt(2))/3     ≈1.4714045207910316829