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 l12_22_a : forall A B C D P,
Out P A C -> OS P A B D -> Par A B C D ->
CongA B A P D C P.