Require Export GeoCoq.Tarski_dev.Ch10_line_reflexivity_2.
Section PerpBisect_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma perp_bisect_sym_3 : forall A B C D,
Perp_bisect A B C D ->
Perp_bisect B A D C.