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八年级(下)几何主要研究的是特殊四边形的性质和判定,学生在小学阶段接触过直观图形,但图形的性质经常用描述性的语言来解释,抽象性不强。而八年级(下)接触的应该是严密性、规范性很强的图形的性质和判定,这样就增加了学习的难度。而这些图形的性质和判定又是进一步学习推理、证明的基础,对于后续学习具有至关重要的意义。因此掌握这几种特殊四边形的性质和判定成为八年级(下)数学学习的一个重要内容,进行这些知识的学习必须实现由具体到抽象,再由抽象到具体的转化过程。本文主要研究这几节新课课堂教学中的导入环节。
The eighth grade (below) geometry is mainly about the nature and judgment of special quadrilateral, students in the elementary school stage exposed visual graphics, but the nature of the graphic is often used to explain the descriptive language, abstract is not strong. The eighth grade (below) contact should be tight, highly normative nature of the graphics and judgments, thus increasing the difficulty of learning. And the nature and judgment of these figures are the basis of further learning reasoning and proof and are of crucial significance to follow-up study. Therefore, mastering the nature and judgment of these special quadrangles becomes an important part of mathematics learning in the eighth grade. The study of these knowledge must be realized from the abstract to the abstract, from the abstract to the concrete transformation. This article mainly studies the introduction of new courses in these sections.