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圆是日常生活、工农业生产等各行各业中最常见的图形之一,圆的许多知识不仅有广泛的实用意义,而且是进一步学习数学以及其他学科的重要基础,因此,圆也是平面几何中最基本的几何图形之一,圆的一些基本知识是现代社会中每个公民适应日常生活、参加生产和进一步学习所必需的几何基础知识。应使每一个学生切实学好。本章在初中三年级进行教学,教学时间约需52课时,下面简单介绍一下本章的一些情况。一、教学内容与教材分析 (一)主要内容本章以小学学过的圆的知识为基础,进一步系统地研究圆的有关知识,因为本章的内容较多,为便于学生学习,按照知识之间的内在联系与相对独立性,把本章的内容分为四大节。
Circle is one of the most common graphs in daily life, industrial and agricultural production and other industries. Many of the knowledge of the circle is not only of broad practical significance, but also an important basis for further study of mathematics and other disciplines. Therefore, the circle is also in plane geometry. One of the most basic geometrical figures, some basic knowledge of the circle, is the basic knowledge of geometry necessary for every citizen in modern society to adapt to daily life, participate in production, and further study. Every student should be properly studied. This chapter teaches in the third grade of junior high school. The teaching time takes about 52 hours. Here are some brief introductions to this chapter. I. Analysis of Teaching Contents and Teaching Materials (I) Main Content This chapter is based on the knowledge of elementary schools and further studies the relevant knowledge of the circle systematically. This chapter contains more content, so as to facilitate students’ learning, according to the knowledge Intrinsic connection and relative independence, the content of this chapter is divided into four major sections.