在高中平面向量的学习中,经常会遇到以三角形为载体,且涉及一串向量线性和的问题,初次接触,使人会有无从下手的感觉.本文试图通过对典型例题的多种解答,来揭示问题的特点和本质所在,同时找到这类问题的最佳解法. In the study of high school plane vector, we often encounter the problem that the triangle is the carrier, and involves a series of vector linear summation, the first contact, make people have no sense of starting .This article attempts to answer many typical examples, To reveal the characteristics and essence of the problem, and find the best solution to such problems.