No.
No.
A tetrahedron has 6 vertices that are all nonparallel.Therefore, a tetrahedron has 0 parallel lines.
No. The faces of a tetrahedron are equilateral triangles, but none of the faces is parallel to another one of the faces -- they could not be parallel, since by the definition of a tetrahedron, all the faces intersect(!) and parallel planes do not intersect.
A tetrahedron is a four sided polyhedron. Each face is a triangle. If it is a regular tetrahedron, then each face is an equilateral triangle.
no
No.
A tetrahedron must be plane faced and so, it is just an ordinary tetrahedron.
A tetrahedron is a triangular based pyramid that has 4 faces none of which are parallel it also has 6 edges and 4 vertices
A tetrahedron
612985
None.
Triangular