Platonic Solids

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(Uniform #1) Tetrahedron
Vertices:  4  (4[3])
Faces:4  (equilateral triangles)
Edges:6
Symmetry:  Full Tetrahedral  (Td)
Dihedral Angle:  acos(1/3)    ≈70.528779366 degrees
Dual Solid:  Tetrahedron (itself)
(values below based on edge length = 1)
Circumscribed Radius:  sqrt(6)/4    ≈0.612372435695794524549
Midscribed Radius:  sqrt(2)/4    ≈0.35355339059327376220
Inscribed Radius:  sqrt(6)/12    ≈0.20412414523193150818
Volume:sqrt(2)/12    ≈0.11785113019775792073