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在新课程的背景下,大纲对立体几何的要求降低了,角及距离的有关计算,被要求用向量方式解决,推理论证的要求也降低了许多.但即使这样,许多学生仍然对立体几何感到棘手.教师需要思考的问题是:采用何种手段,可以使学生更能充分理解这部分内容,即如何才能使我们的教学更有效益?在新课
In the context of the new curriculum, the requirements of the outline for the three-dimensional geometry are reduced. The calculation of the angles and distances is required to be solved in a vector manner. The requirements for the deduction proofs are also reduced a lot. But even so, many students still feel stereoscopic geometry. Difficulties. Teachers need to think about the question: What kind of means can be used to enable students to fully understand this part of the content, that is, how can we make our teaching more effective? In the new lesson