Require Export GeoCoq.Elements.OriginalProofs.lemma_twolines2.
Require Export GeoCoq.Elements.OriginalProofs.lemma_9_5b.
Require Export GeoCoq.Elements.OriginalProofs.lemma_9_5a.
Require Export GeoCoq.Elements.OriginalProofs.lemma_collinear5.
Require Export GeoCoq.Elements.OriginalProofs.proposition_10.
Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

Lemma lemma_planeseparation :
forall A B C D E,
OS C D A B -> TS D A B E ->
TS C A B E.