proposition: Lemma prop_25 : forall A B C D E F, A <> B -> A <> C -> Cong A B D E -> Cong A C D F -> Lt E F B C -> LtA F D E C A B.
proof: Proof. apply t18_19. Qed.
imports: GeoCoq.Meta_theory.Continuity.elementary_continuity_props GeoCoq.Tarski_dev.Ch16_coordinates_with_functions