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

Lemma perp_bisect_equiv_def :
forall P Q A B, Perp_bisect P Q A B <-> Perp_bisect_bis P Q A B.