由于平面图形中的线段可以视为向量,线线之间的位置关系、大小关系以及边角关系均可以用向量式表示,这就为向量与三角的联系、沟通提供了条件.纵观近年来的高考题或模考题不难发现,三角与平面向量的交汇题已经成为高考对三角、平面向量内容考查的一种新题型,而且难度在不断加大.针对性地复习这类问题既能加强知识间的纵横联系,又能拓宽视 Since the line segments in the graphic can be regarded as vectors, the position, the size and the relationship between the lines can be expressed in a vector format, which provides the conditions for the connection and communication between the vectors and the triangles. The college entrance examination questions or mode exam questions is not difficult to find, the intersection of the triangle and the plane vector has become a college entrance examination on the triangle, flat vector content examination of a new type of question, and the difficulty is constantly increasing .Considering the review of such issues both Strengthen the vertical and horizontal links between knowledge, but also broaden their perspectives