Require Export GeoCoq.Meta_theory.Decidability.equivalence_between_decidability_properties_of_basic_relations.
Section T5.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma le_anti_symmetry : forall A B C D, Le A B C D -> Le C D A B -> Cong A B C D.