在近几年各地的中考试卷中,常出现图形在直线上翻滚与点相关的中考题,或求翻滚过程中某点经过的路径,或求翻滚结束时某点的位置.这类试题需要考生具备一定的想像力,对翻滚过程进行合理的分解,转化成若干个扇形,并利用旋转的有关性质进行计算.由于此类问题灵活性较强,学生理解起来就会 In recent years all over the examination papers, often appear in a straight line on the graph tumbling and point-related test questions, or seeking a certain point in the process of rolling through the path, or seeking a certain point at the end of tumbling .This type of test requires candidates Have a certain imagination, the rolling process of a reasonable decomposition, into a number of fan-shaped, and use the rotation of the nature of the calculation.Because of such problems more flexible, students will understand it