等面积法是一种常用的、重要的数学解题思想方法。它是利用“同一个图形的面积相等”“分割图形后各部分面积之和等于原图形的面积”“同底等高或等底同高的两个三角形的面积相等”等性质解决有关的数学问题。在解题过程中,灵活运用等面积法解答相关问题,可以使解题思路清晰,解题过程简捷。例1求证:如果一个直角三角形的两条直角边 Equal area method is a commonly used and important method of mathematical problem solving. It is the use of “ ” Other nature to solve the mathematical problems. In the process of problem solving, flexible use of equal area method to answer relevant questions, can make the problem solving ideas clear and simple problem solving process. Example 1 Proof: If two right-angled edges of a right-angled triangle