一、设计说明1.学情分析学生已经学完了初中数学的全部知识和方法,并已进行了第一轮基础知识的复习,可以很灵活地整合各部分的知识解决数学问题.故本专题的难点是一些常见的辅助线的作法,要求学生能根据题目要求运用恰当的方法求解.2.设计思想复习目标:通过专题复习,引导学生掌握求解圆与锐 First, the design description 1. Academic analysis Students have completed the junior high school mathematics knowledge and methods, and has carried out the first round of basic knowledge review, can be very flexible to integrate the various parts of the knowledge to solve mathematical problems. Difficulties is the common practice of the auxiliary line, require students to use the appropriate method to solve the problem according to the subject .2. Design thinking Review the goal: Through the review of the topic, to guide students to master the circle and the sharp