立体几何中如何作辅助元素任鑫（湖南省望城县第四中学４１０２００正确、熟练地掌握和运用作辅助线的方法和规律是迅速解决平面几何问题的关键．同样，要想解好立体几何问题，也常常要作辅助直线、辅助平面及辅助几何体，在此统称为辅助元素．现就近几年全国高考数学试题... How to make auxiliary elements in three-dimensional geometry Ren Xin (The Fourth Middle School 410200 in Wangcheng County, Hunan Province The correct and skillful method and rule for mastering and applying auxiliary lines is the key to quickly solving plane geometric problems. Similarly, to solve the problem of solid geometry , Also often used as auxiliary lines, auxiliary planes, and auxiliary geometry, these are collectively referred to as auxiliary elements. Nowadays, the national college entrance examination mathematics questions have been...