Johnson Solids (Page 1)

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(J14) Elongated Triangular Dipyramid regular faces

Vertices:   8  (2[3] + 6[4]) Faces: 9  (6 equilateral triangles + 3 squares) Edges: 15 Symmetry:   3-fold Prismatic  (D3h) (values below based on edge length = 1) Volume: (2*sqrt(2)+3*sqrt(3))/12     ≈0.668714962287735164849