三角形的有关知识是“空间与图形”中最为核心的内容.它包括两类:一是基于一个三角形的知识,包括三角形各个元素之间的关系(边之间的关系、角之间的关系、边与角的关系),以及有关的重要线段(高线、中线、角平分线、中位线);二是基于三角形之间关系的知识,如两个三角形的全等关系(性质与判定)等.一、中考内容要求1.了解三角形的有关概念及各元素之间的关系, The related knowledge of the triangle is the core of “space and graphics.” It includes two categories: one is based on the knowledge of a triangle, including the relationship between the various elements of the triangle Relations, edges and corners), as well as the relevant important line segments (high line, midline, bisector, median line); second, knowledge based on the relationship between triangles, such as the congruent relationship between two triangles Judgment), etc. First, the exam content requirements 1. To understand the concept of the triangle and the relationship between the various elements,