立体几何的备考策略

• 作 者: 朱田晟骜
• 出 处: 高中生
• 发表日期: 2017年21期
• 关键词: 推理论证 推理过程 证明过程 空间直角坐标系 法向量 数学思想方法 考查方式 不动点 考试要求 向量法

一、把握空间中点、线、面的关系推理论证能力是高考立体几何考查的着力点.要说明一个命题为假命题,只需要举出一个反例即可;要说明一个命题为真命题,就必须给出证明过程.在立体几何的推理过程中,要求理由充分、层次清楚、书写规范,要准确理解和灵活运用立体几何的相关定义、定理、公理等.例1已知l,m是两条不同的直线,α,β是两个不同的平面,下列命题为真命题的是

First, to grasp the spatial midpoint, line, surface relationship The ability of reasoning is the focus of the college entrance examination geometric geometry to illustrate a proposition for the fake proposition, you can only cite a counter-example can be; to illustrate a proposition is true proposition, We must give the proof process.In the reasoning process of the three-dimensional geometry, the requirements of a sufficient reason, a clear hierarchy, writing norms, to accurately understand and flexibly use the relevant definitions of solid geometry, theorems, axioms, etc. Example 1 is known l, m is two Different straight lines, α, β are two different planes, the following proposition is true proposition is