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A general (not necessarily regular) tetrahedron, defined as a convex polyhedron consisting of four (not necessarily identical) triangular faces can be specified by its polyhedron vertices as , where , ..., 4. Then the volume of the tetrahedron is given by.
Best Answer: The molecular geometry simply refers to the shape of the molecule without taking into account the lone pairs of electrons, which is what your professor was asking. Tetrahedral is the geometry when the lone pairs are considered, called the electron-pair geometry.Source(s):etrahedral is the geometry when the lone pairs are considered, called the electron-pair geometry.