Require Export GeoCoq.Meta_theory.Parallel_postulates.parallel_postulates.
Require Export GeoCoq.Meta_theory.Parallel_postulates.par_trans_NID.
Section T13.
Context `{TE:Tarski_euclidean}.

Lemma inter__npar : forall A1 A2 B1 B2 X,
Inter A1 A2 B1 B2 X -> ~ Par A1 A2 B1 B2.