Require Export GeoCoq.Elements.OriginalProofs.lemma_raystrict.
Require Export GeoCoq.Elements.OriginalProofs.lemma_congruenceflip.
Require Export GeoCoq.Elements.OriginalProofs.lemma_ray1.
Require Export GeoCoq.Elements.OriginalProofs.lemma_rayimpliescollinear.
Require Export GeoCoq.Elements.OriginalProofs.lemma_ray3.
Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

Lemma lemma_supplements :
forall A B C D F a b c d f,
CongA A B C a b c -> Supp A B C D F -> Supp a b c d f ->
CongA D B F d b f.