解析几何问题的核心是运用代数的方法解决几何问题,但对于学生,往往在具体问题的求解过程中因为条件多、变化活、运算繁而不知从何下手,或虽有思路却因运算不过关而全盘皆输.因此,在高三复习解析几何时,教师应着重从解题思路形成和运算过程两方面入手,注重培养学生数学思维能力和计算能力.本节课从一道简单的圆的切线问题出发,设置题组,引导学生以自主探索、合作交流的方式学习,在探 At the heart of analytic geometry is the use of algebraic methods to solve geometric problems, but for students, often in the process of solving specific problems because of many conditions, changes in life, the operation of complicated and I do not know where to start, But all lose .Therefore, when reviewing the analytical geometry in the third year, teachers should focus on solving the problem of thought formation and operation process from two aspects, focusing on cultivating students’ mathematical thinking ability and computing ability.This lesson from a simple circle tangent problem Departure, set the problem group, guide students to self-exploration, cooperation and exchange of learning, exploration