Johnson Solids (Page 1)

(box: x-ray)  (F: faces)  (slider: perspective)  (image: L=rotate R=zoom)  (M: metrics)
Please use a browser that supports "canvas"

(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