5) Our claim is equivalent to sayin

5) Our claim is equivalent to saying that every polyhedron has two faces
that have the same number of edges. Assume not, and let Ρ be a
counterexample. Then the dual of Ρ would be a counterexample for
the result of the previous exercise.

Kết quả (Anh) 2:

5) Our claim is equivalent to every polyhedron has Saying có two faces
have the same number of có edges. Giả sử not, and let Ρ be a
counterexample. Then the dual of Ρ would be a counterexample for
the result of the previous exercise.