Section Euclid.
Context `{Ax:area}.

Lemma proposition_44A :
forall A B D E F G J N,
PG B E F G -> CongA E B G J D N -> BetS A B E ->
exists X Y, PG A B X Y /\ CongA A B X J D N /\ EF B E F G Y X B A /\ BetS G B X.