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Of, relating to, or having the shape of a tetrahedron.

Vectorization of the image 'Tetrahedron.jpg', depicting a tetrahedron, a Platonic solid.

Of, relating to, or having the shape of a tetrahedron.

A flattened tetrahedron.

Of, relating to, or having the shape of a tetrahedron.

A space-filling tetrahedral disphenoid inside a cube. Two edges have dihedral angles of 90°, and four edges have dihedral angles of 60°.