Require Export GeoCoq.Elements.OriginalProofs.lemma_inequalitysymmetric.
Require Export GeoCoq.Elements.OriginalProofs.lemma_ray4.
Require Export GeoCoq.Elements.OriginalProofs.lemma_collinearorder.
Require Export GeoCoq.Elements.OriginalProofs.lemma_congruenceflip.
Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

Lemma proposition_08 :
forall A B C D E F,
Triangle A B C -> Triangle D E F -> Cong A B D E -> Cong A C D F -> Cong B C E F ->
CongA B A C E D F /\ CongA C B A F E D /\ CongA A C B D F E.