Section T11_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma l11_3 : forall A B C D E F,
CongA A B C D E F ->
exists A', exists C', exists D', exists F',
Out B A' A /\ Out B C C' /\ Out E D' D /\ Out E F F' /\
Cong_3 A' B C' D' E F'.