动态型几何问题,体现了近代数学运动变化的思想,是近几年中考命题的重点,应引起重视.解这类题目的一般方法是抓住变化中的“不变量”,以不变应万变.灵活和熟练运用基础知识是解题成功的关键. The dynamic geometry problem embodies the thinking of the modern mathematics movement, and it is the focus of the proposition of the middle school entrance examination in recent years. It should be paid attention to. The general method to solve this type of problem is to grasp the “invariant” in the change and to make constant changes. Change. Flexible and skilled use of basic knowledge is the key to success.