Definition pentagontriangle_to_triangle {C : category} {tuua : tensor_unit_unitors_associator C} (pt : pentagontriangle tuua) : triangle_identity (tensor_unit_unitors_associator_laxleftunitor tuua) (tensor_unit_unitors_associator_laxrightunitor tuua) (tensor_unit_unitors_associator_laxassociator tuua) := pr1 pt.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Monoidal.WhiskeredBifunctors. Require Import UniMath.CategoryTheory.Monoidal.Categories.