立体几何是高中数学的重要内容,是每年高考重点考查的主干知识之一,常是“两小一大”三个试题,分值在20分以上,考查空间直线、平面位置关系的判断及证明,求空间的角和距离以及几何体的面积和体积的计算,考查学生的空间想象能力和逻辑推理能力.空间的直线、平面的位置关系,特别是平行与垂直的位置关系是整个立体几何的基础,也是 Three-dimensional geometry is an important part of high school mathematics, is one of the main knowledge of the key examination of the annual college entrance examination, often “two small one big ” three questions, scores in more than 20 points, examining spatial linear and plane position relationship judgment And proof, find the angle and distance of the space and the calculation of the area and volume of the geometry, to examine the student’s spatial imagination ability and logical reasoning ability.The spatial linear and planar positional relationship, especially the parallel and vertical positional relationship is the entire three-dimensional geometry The foundation, too