For any northeast path ν, we define two bivariate polynomials associated with the ν-associahedron: the F-and the H-triangle. We prove combinatorially that we can obtain one from the other by an invertible transformation of variables. These polynomials general-ize the classical F-and H-triangles of F. Chapoton in type A. Our proof is completely new and has the advantage of providing a combinatorial explanation of the relation between the F-and H-triangle.