初中数学中的“圆问题”一直是一个饶有兴趣的课题。因为它切入的角度实在太多,也因为有关它的诸多问题实在是有趣。笔者认为,学习圆问题,趣味引入不可或缺、自主探索不可或缺、探究延伸不可或缺,以此让学生在摇曳生姿的圆问题的学习中,锻造思维,发展思维,在数学的密林中得到多重淬炼和提升。 Junior high school mathematics “round question ” has always been an interesting subject. Because it is too much to cut in, but also because of the many problems it is really interesting. The author believes that the study of round problems, the indispensable introduction of fun, independent exploration indispensable, the extension of inquiry is essential, so that students in the sashaping circle of learning, forging thinking, development thinking, mathematics in the jungle In the multiple quenching and upgrading.