平面几何的内容很多,涵盖范围很广。作好辅助线是解决几何题的关键,大多数初学者都对此感到迷茫,不知所措,久而久之,便产生了畏惧感和厌烦感,就有“几何几角,叉叉角角,老师难教,学生难学”之说。作辅助线的技巧和方法离不开基础知识,没有强大的基础知识作后盾,一切都将是纸上谈兵。把书本上的每一条定理、公理、性 A lot of plane geometry, covering a wide range. Aid line is the key to solve the problem of geometry, most beginners feel confused, overwhelmed, over time, they have a sense of fear and boredom, there are “geometric corner, fork angle, the teacher Difficult to teach, students difficult to learn, ”said. Skill and method for supporting line is inseparable from the basic knowledge, there is no backing for a strong foundation of knowledge, everything will be on paper. Put every theorem, axiom, and sex in the book