(** %\textbf{% Five segments axiom.%}% *)

Axiom five_segments : forall A A' B B' C C' D D' : Point,
Cong A B A' B' ->
Cong B C B' C' ->
Cong A D A' D' ->
Cong B D B' D' ->
Bet A B C -> Bet A' B' C' -> A <> B -> Cong C D C' D'.