Chamfered Solids

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Chamfered Tetrahedron (canonical)
version 3
Vertices:  16  (4[3] + 12[3])
Faces:10  (4 equilateral triangles + 6 bi-mirror-symmetric hexagons)
Edges:24  (12 short + 12 long)
Symmetry:  Full Tetrahedral  (Td)
(values below based on long edge length = 1)
Short Edge (12):  2−sqrt(2)    ≈0.58578643762690495120
Long Edge (12):  1
Max Vertex Radius:  sqrt(6)/2    ≈1.2247448713915890491
Edge-scribed Radius:  1
Volume:2*(7−2*sqrt(2))/3    ≈2.7810485835025399349