面积法很早就是人们认识几何图形性质和证明几何命题的有力工具,至今仍很有生命力.它往往可以使某些几何竞赛题化难为易,化繁为简,收到事半功倍的效果.巧用面积法解非面积问题,特别在求线段比有关问题时可使题中量之间关系变得简单明了,可谓朴实蕴藏奇异,简单透出真情.下面给出几种常见类型,以供参考. Area method is a powerful tool for people to understand geometrical properties and prove geometric propositions very early, and it still has great vitality .It can often make some geometric competitions difficult, complex and simple, and receive more effective results. Area method to solve the problem of non-area, especially in seeking the line segment than the related issues can make the relationship between the amount of questions becomes simple and straightforward, can be described as plain stored strange, simple truth revealed below are some common types for reference.