论文部分内容阅读
外接球问题在近几年高考中时常考查,这类问题对我们高三复习的学习和解题困难也很大,为此本人总结了高考外接球中常见的几类问题,供同学们相互学习.一、构造法构造长方体或正方体,利用长方体(或正方体)体对角线就是外接球的直径来解决外接球的问题.例1(2013年辽宁卷理10)已知直三棱柱ABC-A_1B_1C_1的6个顶点都在球O的球面
External ball problems in the college entrance examination in recent years, often check, these problems for our third year of high school review and problem solving is also great, for which I summed up the entrance ball in the common types of problems for students to learn from each other. First, the tectonic method to construct a rectangular parallelepiped or cuboid, the use of cuboid (or cube) body diagonal is the diameter of the external ball to solve the problem of external ball Example 1 (Liaoning Volume 10 in 2013) is known straight prism Prism ABC-A_1B_1C_1 6 vertices are in the sphere O of the ball