向量是新教材补充的内容 .它沟通“数”与“形”,是数形结合的典型范例 ,向量运算有着丰富的背景和几何意义 .这些特点决定了向量方法在中学数学解题中有着广泛的应用 .用向量法解几何题 ,通常需三步 :( 1 )“翻译”问题的条件和结论 ,即将条件和结论用向量语言表示 .( 2 )设置 The vector is a supplement to the new textbook. It communicates “number” and “shape” and is a typical example of a combination of numbers and shapes. Vector operations have a rich background and geometric meaning. These characteristics determine that the vector method has a wide range of mathematical problems in middle school. Applications. Solving geometric problems with vector methods usually takes three steps: (1) The conditions and conclusions of the “translating” question, ie, the conditions and conclusions are expressed in vector language. (2) Settings