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“图形的初步认识”这部分主要介绍的是线段、直线、射线、角、相交直线、平行直线的基础概念和基本性质，它是初中数学中认识和研究几何图形的最基础、最重要、最有价值的知识之一．从这里开始，我们将系统接触几何语言和几何学习的方法，逐步掌握必需的几何知识． 为了帮助大家扎实地掌握“图形的初步认识”中的基础知识和基本技能，现归类探讨本章知识的典型题型，并总结解题感悟，供大家学习参考．
The “Preliminary Understanding of Graphics” section mainly introduces basic concepts and basic properties of line segments, lines, rays, angles, intersecting lines, and parallel lines. It is the most basic, most important, and most important aspect of recognizing and studying geometric figures in junior middle school mathematics. One of valuable knowledge. From here, we will contact the system with geometric language and geometry learning methods, and gradually grasp the necessary knowledge of geometry. In order to help everyone master the basic knowledge and basic skills in “Graphics’ preliminary understanding”, we now classify and discuss the typical types of knowledge in this chapter, and summarize the problem-solving sentiments for reference.