著名的大数学家波利亚曾经指出:“对一个数学问题,改变它的形式,换一种叙述方式,变换它的结构,直到发现有价值的东西,这是解题的一个重要原则.”在数学学习过程中进行研究性探索,关注一题多变、一题多解,有益于培养学生的发散思维能力.在学习探索三角形全等的条件这一节时,给出 The famous mathematician Polya once pointed out: “To a mathematical problem, change its form, change the narrative mode, and change its structure until it finds something of value. This is an important principle for problem solving.” In the process of mathematics learning, research exploration is carried out. Concerned about a changeable topic and multiple explanations of questions, it is beneficial to cultivate students’ divergent thinking ability. In the study of the conditions for the exploration of triangular contingency, it is given