线段与角是平面几何中最基本的概念,在两者的定义:画法、性质、计算计数等方面都有相近之处,两者进行对比可举一反三.一、线段与角在定义、画法上的相近线段定义:直线上两点和它们之间的部分称为线段,这两点称该线段的端点,有始有终,无方向性,可以度量,比较大小.线段表示:如图(?)表示为线段 Lines and corners are the most basic concepts in plane geometry. They are similar in the definitions of painting, character, calculation and counting, and so on. The comparison between the two can give an anecdote. On the line segment definition: two points on the line and the part between them is called a line segment, these two points that the end of the line segment, there are beginning and end, non-directional, you can measure, compare the size. For the line segment