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平面向量是高中数学的重点内容,也是高考的必考内容.向量是什么?既有大小又有方向的“量”.量是什么?数的多少.也就是说量可以用数来表示(现实世界中的量一般是数及其单位,单位就是人为确定的“1”的标准).向量可以用有向线段来表示(以有向线段的长度表示向量的大小,有向线段的方向表示向量的方向),确定了平面和起点之后,平面向量和有向线段一一对应;向量也可以用坐标(即有序数组)来表示,确定了
Plane vector is the key content of high school mathematics, but also the college entrance examination content. What is the vector? Both size and direction “quantity ”. What is the amount? (In the real world the number is generally the number and its unit, the unit is the artificially determined “1 ” standard.) Vector can be used to express the line segment (with the length of the line segment represents the size of the vector, The direction of the vector direction), after the plane and the starting point have been determined, the plane vectors correspond to the directed segments one by one; the vectors can also be represented by coordinates (ie, ordered arrays)