Require Export GeoCoq.Tarski_dev.Ch14_sum.
Section T14_prod.
Context `{T2D:Tarski_2D}.
Context `{TE:@Tarski_euclidean Tn TnEQD}.

Lemma prodp_to_prod : forall O E E' A B C, Prodp O E E' A B C -> Prod O E E' A B C.
Section Grid.