研究背景图形的旋转是初中平面几何中具有重要意义的一部分.这部分对于发展学生的几何直观,空间观念,以及培养学生抽象概括能力和创新意识具有独特的作用.虽然,我们在教学实践中会很清楚地发现学生单独学习这部分知识难度不是很大,但是,一旦把这部分内容和一元二次函数,三角形的性质,圆的性质等相关知识结合考察时,特别是一些涉及几何证明,难度就提升很大. Research background The rotation of graphics is an important part of junior high school plane geometry.This part has a unique role in developing students ’geometric intuition, spatial concepts, as well as cultivating students’ abstract abilities and innovative consciousness.Although we will It is clear that it is not very difficult for a student to study this part alone. However, once this part is combined with relevant knowledge such as the quadratic function, the nature of a triangle, and the nature of a circle, especially when it comes to geometric proofs, Great upgrade.