Is it possible to take a cross section of a tetrahedron and get an octagon? why or why not? a.) yes, because an octagon has eight sides, which is twice the number of faces on a tetrahedron. b.) yes, because a tetrahedron is symmetric about its center. c.) no, because the only cross section that can result from a tetrahedron is a triangle. d.) no, because the number of sides on the resulting shape cannot exceed the number of faces on the solid. d.) no, because the number of sides on the resulting shape cannot exceed the number of faces on the solid.