Library GeoCoq.Meta_theory.Parallel_postulates.rah_thales_postulate

Require Import GeoCoq.Axioms.parallel_postulates.
Require Import GeoCoq.Tarski_dev.Annexes.saccheri.

Section rah_thales_postulate.

Context `{T2D:Tarski_2D}.

Lemma rah__thales_postulate : postulate_of_right_saccheri_quadrilaterals thales_postulate.
Proof.
  intros rah A B C M HNCol HM HCong.
  apply (t22_17__rah _ _ _ M); assumption.
Qed.

End rah_thales_postulate.