Preparing Relative Intensity Triangles

This paper provides the formulas required for the triangular representation of three dimensional primary input intensities. The first section provides an exposition of 'endowment triangles'; and the second presents relative intensity triangles, i.e. those for representing relative primary input endowments of countries, or relative primary input intensity of products. The third section contains the formulas to calculate the coordinates, and the last is devoted to a numerical example.