对称是人类社会和自然界普遍存在的形式之一,大千世界,许多事物都具有某些对称性.对称又是一个数学概念,许多数学问题所涉及的对象具有对称性,不仅包括几何图形中的对称,而且泛指某些对象在有些方面如图形、关系、地位等同彼此相对又相称.对称更是一种思想方法,运用对称性解决问题,既可以减少一些繁琐的计算,使解题方法简洁明快,又可以拓展学生的解题思 Symmetry is one of the common forms of human society and nature. In the world, many things have certain symmetries. Symmetry is also a mathematical concept. Many mathematical problems involve objects that have symmetry and include not only symmetry in geometric figures. , And generally refers to some objects in some aspects such as graphics, relations, status equal to each other and commensurate. Symmetry is a way of thinking, the use of symmetry to solve the problem, can reduce some of the cumbersome calculations, so that the solution method is simple and neat , but also can expand students’ problem-solving thinking