Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

Lemma proposition_26A :
forall A B C D E F,
Triangle A B C -> Triangle D E F -> CongA A B C D E F -> CongA B C A E F D -> Cong B C E F ->
Cong A B D E /\ Cong A C D F /\ CongA B A C E D F.