Require Export GeoCoq.Tarski_dev.Annexes.saccheri.
Section Defect.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma conga3_defect__defect : forall A B C D E F A' B' C',
Defect A B C D E F ->
CongA A B C A' B' C' -> CongA B C A B' C' A' -> CongA C A B C' A' B' ->
Defect A' B' C' D E F.