立体几何解题的重要基础是作图 ,除了要遵循几何作图的基本规则外 ,还要注意与重要公理、定理相联系 .画图尽管要强调立体感 ,在要求不十分严格的条件下 ,可以适当调整图中的线段、曲线的比例 ,但必须符合定理要求 .立体几何解题的作图 ,善于联想和利用基本图形也十分重要 .下 The important basis of solving problems in solid geometry is drawing. In addition to following the basic rules of geometric drawing, attention should be paid to the connection with important axioms and theorems. Although drawing should emphasize three-dimensionality, under the conditions of not very strict requirements, Adjust the proportion of the line segment and curve in the graph properly, but it must meet the requirements of the Theorem. The three-dimensional geometry solves the problem drawing. It is also very important to be good at associating and using basic graphics.