Require Export GeoCoq.Tarski_dev.Ch04_cong_bet.
Section T4_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

(* Specifications: *)
Lemma col_permutation_1 : forall A B C,Col A B C -> Col B C A.
Lemma col_permutation_2 : forall A B C, Col A B C -> Col C A B.
Lemma col_permutation_3 : forall A B C, Col A B C -> Col C B A.
Lemma col_permutation_4 : forall A B C, Col A B C -> Col B A C.
Lemma col_permutation_5 : forall A B C, Col A B C -> Col A C B.
End T4_1.