论文部分内容阅读
一、“直线和平面”这一章的内容是立体几何的基础。在复习时要反复梳理知识系统,掌握每个概念的本质属性,理解每个判断定理和性质定理的前提条件和结论。二、在研究线线、线面、面面的位置关系时,主要是研究平行和垂直关系。其研究方法是采取转化的方法。三、三垂线定理及其逆定理是立体几何中应用非常广泛的定理,只要题设条件中有直线和平面垂直时,就往往需要使用三垂线定理及其逆定理。每年高考试题都要考查这个定理。三垂线定理及其逆定理主要用于证明垂直关系与空间图形的度量。如:证明异面直线垂直,确定二面角的平面角,确定点到直线的垂线。
First, the content of the chapter “Straight Line and Plane” is the basis of solid geometry. When reviewing, we should sort out the knowledge system repeatedly, master the essential attributes of each concept, and understand the preconditions and conclusions of each theorem of judgment and nature. Second, in the study of line, line surface, surface location, the main is to study the parallel and vertical relations. The research method is to take the transformation method. Third, the three vertical line theorem and its inverse theorem is the application of a very wide range of theorems in solid geometry, as long as the conditions set in a straight line and plane vertical, it is often necessary to use the three vertical line theorem and its inverse theorem. Every year entrance exam questions should examine this theorem. The three-vertical theorem and its inverse theorem are mainly used to prove the vertical relationship and the spatial graph measurement. Such as: proving heterogeneous straight line vertical, determine the dihedral angle of the plane, to determine the vertical line to the point.