(2) Dan Thompson said in an article several systems to measure in dealing with the figure. I can not understand one of them. I transcribe the method. If anyone understands and can illustrate with an example I will be very grateful: "TREE-POINT MEASUREMENT, involves identifying major and minor points and comparing triangles and angles against one another. "Triangulation is a good word for it," he says. "It allows you to notice inmediately if something is bigger or smaller." These triangles can be based upon the areas between the major points of a figure. "With time and experience, you can tell if a certain point is a mjor point or a minor point," he says. "Some points are important, others not."