空间图形的位置关系是立体几何的重要内容。查看各年全国各省市的数学高考试题,可知道在立体几何这个部分在空间角的考查都有试题。而在这个部分中我们常分为空间线线角,线 The spatial graph’s positional relationship is an important part of solid geometry. View the various provinces and cities throughout the country’s college entrance examination exams, you know that in this part of the three-dimensional geometry in the angle of the test have questions. In this part we are often divided into space line angle, line