立体几何中常用七种变形或变位的技巧:“移、割、补、展、叠、射、转”.大家要熟练掌握.1.移是指将某图形移到适当位置,使不在同一平面的元素集中到一个平面内,再利用平面几何知识进行研究.利用“平移”可实现立体向平 There are seven commonly used deformation or displacement techniques in three-dimensional geometry: “move, cut, fill, expand, stack, shoot, rotate”. We must master. 1. Shift refers to moving a figure to an appropriate position. The elements that are not in the same plane are concentrated in one plane, and then the plane geometry knowledge is used for research. The use of “translate” can achieve three-dimensional