regular tetrahedron


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Noun1.Regular tetrahedron - a tetrahedron with four equilateral triangular facesregular tetrahedron - a tetrahedron with four equilateral triangular faces
ideal solid, Platonic body, Platonic solid, regular convex polyhedron, regular convex solid, regular polyhedron - any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
References in periodicals archive ?
Using the trace inequality for a regular tetrahedron from Lemma A.
How many faces, including the base, does a regular tetrahedron have?
For example, for the regular tetrahedron, the angle defect is (in degrees) is: