(* Gabriel Braun November 2012 *)
Require Export GeoCoq.Tarski_dev.Ch12_parallel.
Section Quadrilateral.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma mid_par_cong1 :
forall A B A' B' M,
A <> B ->
Midpoint M A A' ->
Midpoint M B B' ->
Cong A B A' B' /\ Par A B A' B'.