勾股定理是初中平面几何的重要定理之一.围绕这一定理常出现综合计算题,对初二同学来说难度较大,但用代数法“设而不求,整体代入”可巧解这一类题目.现举例说明. 一、求面积 The Pythagorean theorem is one of the important theorems of the plane geometry of the junior middle school. Around this theorem, a comprehensive calculation problem often appears. It is more difficult for the students of the second grade, but it can be solved by the algebraic method “set without seeking, the whole substitution”. The title is an example. I. Find the area