运动问题是以三角形、四边形或圆为背景,用运动的观点来探究几何图形变化规律的问题。这类题的特点是:图形中的某些元素(如点、线段、角等)或整个图形按某种规律运动,图形的各个元素在运动变化过程中相互依存,相互制约,考查学生的分类讨论、转化、数形结合、函数与方程等思想方法。解决这类题的基本思路是“以静制动”:即将运动的元素看成静止的元素;解题时,要对几何元素 The motion problem is based on the triangle, quadrangle or circle as the background, with the motion point of view to explore the law of geometric changes. The characteristics of such questions are: some elements in the graphic (such as points, line segments, corners, etc.) or the entire graphic movement by a certain law, the various elements of the graphic interdependence in the process of changes in the movement, mutual restraint, test the classification of students Discussion, transformation, combination of numbers, functions and equations and other ideas and methods. The basic idea to solve this kind of problem is “Static braking”: the elements of the upcoming movement are considered as static elements; when solving the problem, the geometric elements