向量是一种新的量,不同于我们以往学过的数量,它兼有代数与几何两种形式,具有代数的抽象与几何的直观,是集“数”与“形”于一身的数学概念,因此解题中要注意数形结合的思想.在高考中以考查向量的概念与运算为主,其中向量的模与向量数量积的计算尤为重要.特别是牵涉到动点问题,许多学生无从下手.本文主要介绍活用中点关系巧 Vector is a new quantity, different from the quantity we learned in the past. It has both algebraic and geometric forms. It has the abstraction of algebra and the intuition of geometry. It is a combination of numbers and numbers. A mathematics concept, so the problem should pay attention to the combination of number and shape of the idea in the college entrance examination to examine the concept and operation of the vector-based, of which the vector modulus and vector quantity product of the calculation is particularly important.Especially involving the moving point problem , Many students have no way to start.This article mainly introduces the use of midpoint relationship clever