Require Export GeoCoq.Tarski_dev.Ch11_angles.
Section Suma_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma ex_suma : forall A B C D E F, A<>B -> B<>C -> D<>E -> E<>F ->
exists G H I, SumA A B C D E F G H I.