Require Export GeoCoq.Tarski_dev.Ch05_bet_le.
Ltac eCol := eauto with col.
Section T6_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma l6_11_existence : forall A B C R,
R<>A -> B<>C -> exists X, Out A X R /\ Cong A X B C.