Require Export GeoCoq.Elements.OriginalProofs.proposition_12.
Require Export GeoCoq.Elements.OriginalProofs.lemma_samesidesymmetric.
Require Export GeoCoq.Elements.OriginalProofs.lemma_planeseparation.
Require Export GeoCoq.Elements.OriginalProofs.lemma_droppedperpendicularunique.
Require Export GeoCoq.Elements.OriginalProofs.lemma_fiveline.
Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

Lemma proposition_07 :
forall A B C D,
neq A B -> Cong C A D A -> Cong C B D B -> OS C D A B ->
eq C D.