The establishment method of the system is almost universal, and any non-special length can be converted into coordinates, so that the internal coordinates can be directly obtained by using the internal coordinate formula, and then μ and λ can be directly obtained by substituting into the known vectors, thus obtaining the results.

Establishing a system is to establish a rectangular coordinate system and solve geometric problems with analytical geometry. Generally speaking, the calculation of the subject of building a department will be relatively large, but it will be clearer.

This method is quick and simple to deal with many problems. The main reason is that everything becomes orderly after the establishment of the department, but before the establishment of the department, the topics are complicated and disorderly, which gives people a blunt feeling.

The architectural system is mostly suitable for right-angled or symmetrical graphics, but most of the problems in middle school mathematics are like this.