“问题是数学的心脏”．数学题五花八门，解题的方法也各式各样，就是说，针对不同的数学题要采取不同的方法解之方才便捷．这里就一些数学题根据其外形特性，联想到某些公式、方程、解题经验等，而构造出相应的公式、方程，然后利用它们的性质来解决问题．这种解题方法往往就 “The problem is the heart of mathematics.” There are a variety of mathematics problems, and the methods for problem solving are also varied. That is to say, different approaches to solving different math problems are convenient. Here some of the mathematics questions are based on their shape characteristics, associated with certain formulas, equations, problem-solving experience, etc., and formulate the corresponding formulas, equations, and then use their properties to solve the problem. This problem solving method is often