在平面几何中 ,不少命题的证明与计算都要涉及到添加辅助线问题 ,从简单的特殊点到复杂的辅助图形 ,都需要我们精心设计 ,恰到好处地进行添加或构造 ,这样 ,就可以借助辅助线或辅助图形的“桥梁”作用 ,来沟通题设和结论之间的关系 ,使隐含条件显露出来 ,使分散条件集中起来 , In plane geometry, proofs and calculations of many propositions involve the addition of auxiliary lines. From simple special points to complex auxiliary graphics, we need to design meticulously and add or construct them just right so that we can use The “bridge” function of auxiliary lines or auxiliary graphics, to communicate the relationship between the questions and the conclusions, so that the hidden conditions are revealed and the decentralized conditions are brought together.