Trilinear Coordinates - And Other Methods of Modern Analytical Geometry of Two Dimensions: An Elementary Treatise #268508

I have sought to exhibit methods rather than results, to furnish the student with the means of establishing properties for himself rather than to present him with a repertory of iso lated propositions ready proved. Thus I have not hesitated in some cases to give a variety of investigations Of the same theorem, when it seemed well so to compare different methods, and on the other hand interesting propositions have sometimes been placed among the exercises rather than inserted in the text.