“同位角、内错角、同旁内角”这部分内容是学习“平行线的性质和判定”的基础 ,几何推理论证恰恰从“平行线”这一章开始 ,所以教师在指导学生学习这一节内容时 ,不仅要让学生理解这里的几何概念 ,更重要的是激起学生学习几何的兴趣 ,过好几何论证入门关。本文结合本节内容介 The contents of “apposition angle, inner angle angle, same side angle” are the basis for learning the “property and judgment of parallel lines”. The geometric inference theory starts from the “parallel lines” chapter, so teachers are instructing students to learn In the context of the festival, not only should students understand the geometric concepts here, but more importantly, they should arouse the interest of students in learning geometry and get a good start in geometric argumentation. This article combines the contents of this section