End T11_1.
Section T11_2.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma ex_conga_ts : forall A B C A' B' P,
~ Col A B C -> ~ Col A' B' P ->
exists C' : Tpoint, CongA A B C A' B' C' /\ TS A' B' C' P.