动点问题是中考的热点,也是教学中的难点。这类题综合性强、开放度高,要求学生能从运动、变化的角度去思考问题。动点类问题从运动主体来看,包括单动点问题、双(多)动点问题;从运动路径来看,包括在直线形、多边形、圆、函数图像上运动等;从问题呈现方式来看,可以研究面积问题、函数关系、最值问题、存在性问题等。本文所说的用“四维法”分析动点类问题,是指从“运动路径、时间范围、运动过程分析、数量表示”四个 Moving point problem is a hot spot in the exam, but also teaching difficulties. These questions are comprehensive and open, requiring students to think in terms of their movements and changes. From point of view of motion, it includes motion on straight line, polygon, circle and function image; from the way of problem presentation Look, you can study area problems, functional relationships, the most value problems, existing problems. In this paper, we use the “four-dimensional method” to analyze the moving point problem, which means that from the “movement path, time range, analysis of the movement process, the number of” four