Dipyramids & Trapezohedra
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Hexagonal Dipyramid
Vertices:
8 (6[4] + 2[6])
Faces:
12 (isosceles triangles)
Edges:
18 (6 short + 12 long)
Symmetry:
6-fold Prismatic (D6h)
Dihedral Angle:
acos(−3/5)
≈126.869897646 degrees
Dual Solid:
Hexagonal Prism
(values below based on unit-edge-length Hexagonal Prism)
Short Edge (6):
2*sqrt(3)/3
≈1.1547005383792515290
Long Edge (12):
4*sqrt(3)/3
≈2.3094010767585030580
[4]-Vertex Radius (6):
2*sqrt(3)/3
≈1.1547005383792515290
[6]-Vertex Radius (2):
2
Edge-scribed Radius:
1
Inscribed Radius:
2*sqrt(5)/5
≈0.89442719099991587856
Volume:
8*sqrt(3)/3
≈4.6188021535170061161