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求异面直线的距离,在立体几何里是一个难点.一般学生对此感到棘手,如何突破这个难点?教师应在该单元结束后,及时地抓住具有代表性的空间图形在不同条件下求异面直线距离的讨论,让学生充分发挥自己的见解,这样就可以突破这个难点了.本文就求异面直线距离的讨论式习题课,师生共同寻求探索出来的解题规律,采用例题的形式,写出来供读者参考.
Finding the distance from a straight line in a different plane is a difficult point in the three-dimensional geometry. The average student finds it difficult to learn how to overcome this difficulty. Teachers should grasp the representative spatial pattern in time after the completion of the unit. The discussion of the straight-line distance from different sides allows students to fully display their own views, so that we can break through this difficult point. This paper discusses straight-line distance-based discussion-type exercises, teachers and students jointly seek out the problem-solving law, using examples of Form, written for readers’ reference.