Section Archimedes_for_angles.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma archi_in_acute_angles :
archimedes_axiom ->
forall A B C D E F,
~ Col A B C -> Acute D E F ->
exists P Q R, GradA A B C P Q R /\ LeA D E F P Q R.