作辅助线是解答几何证明题的关键。一道题能否顺利地解出,很大程度上取决于辅助线的添加是否有效,所以辅助线实际上是从已知到未知的一座桥梁,搭好了就能顺利过河,到达彼岸,否则即使方向正确,中间隔着一条河,仍然到不了目的地。而且,通过添加辅助线,还可以进一步培养学生的逻辑思维能力,但是,如何作 Auxiliary line is the key to solving the problem of geometric proof. Whether a problem can be solved smoothly depends largely on whether the auxiliary line is effective or not. Therefore, the auxiliary line is actually a bridge from known to unknown and can be successfully crossed to reach the other side. Otherwise, Even in the right direction, separated by a river, still can not reach the destination. Moreover, by adding aids, you can further develop students’ logical thinking skills, but how to do