Require Export GeoCoq.Elements.OriginalProofs.proposition_03.
Require Export GeoCoq.Elements.OriginalProofs.lemma_NCorder.
Require Export GeoCoq.Elements.OriginalProofs.lemma_NCdistinct.
Require Export GeoCoq.Elements.OriginalProofs.lemma_ABCequalsCBA.
Require Export GeoCoq.Elements.OriginalProofs.lemma_equalanglestransitive.
Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

Lemma lemma_angleorderrespectscongruence :
forall A B C D E F P Q R,
LtA A B C D E F -> CongA P Q R D E F ->
LtA A B C P Q R.