论文部分内容阅读
对于“立体几何初步”的知识,高三学生已经经历了第一轮复习,比较熟悉三视图、点线面的位置关系、平行与垂直问题的判定方法,比较好地落实了基本知识、基本技能和基础方法,但对于立体几何中考查能力的运动变化问题,学生普遍感到吃力。本节课教师将循序渐进地与学生一起开展“立体几何”的思维探索之旅,培养学生的空间想象能力和逻辑推理能力。1课前热身,交流感悟问题1:如图1,已知点E,F分别是正方体ABCD-A_1B_1C_1D_1的棱AB,AA_1的中点,点M,N分
For the knowledge of “preliminary geometry ”, high school students have experienced the first round of review, more familiar with the three views, the location of the point line surface, parallel and vertical determination of the problem, a better implementation of the basic knowledge, the basic Skills and basic methods, but students generally find it hard to deal with changes in the ability to test abilities in stereoscopic geometry. This lesson will be gradual and step-by-step with students to carry out “three-dimensional geometry ” thinking journey to explore and develop students’ spatial imagination and logical reasoning ability. 1 warm-up before class, exchange perceptions Question 1: As shown in Figure 1, known points E, F are the cube ABCD-A_1B_1C_1D_1 AB, AA_1 midpoint, point M, N