12-Johnson solid | 3-dipyramid

vertices | 5 edges | 9 faces | 6 (6 triangles)

1 (9 edges)

1/(3 sqrt(2))≈0.235702

(3 sqrt(3))/2≈2.59808

sqrt(2/3)/3≈0.272166

(assuming unit edge length)

3-dipyramidal graph

3-prism graph

point group D_3h

amphichiral | convex | deltahedron | dipyramid | equilateral | isohedron | Johnson | rigid | simple