A tetrahedron is obtained from the figure by folding the points D, E and F.

How many

a) facets are there in the tetrahedron?

Answer: The tetrahedron has facets.

b) edges are there in the tetrahedron?

Answer: The tetrahedron has facets.

c) vertices are there in the tetrahedron?

Answer: The tetrahedron has vertices.