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课本例题是数学教材的重要组成部分,也是课本的精髓.课本例题既能加深学生对概念、知识的理解,又是培养学生能力的重要载体.下面通过一道课本例题,谈谈如何挖掘它的教学价值.一、题目(人教版八年级上册)图1是A、B、C三岛的平面图,C岛在A岛的北偏东50°方向,B岛在A岛的北偏东80°方向,C岛在B岛的北偏西40°方向,从B岛看A,C两岛的视角∠ABC
Sample textbook is an important part of mathematics textbooks, but also the essence of textbooks.Examples of textbooks can not only deepen the students ’understanding of concepts and knowledge, but also an important carrier of training students’ ability.Through a textbook example, talk about how to tap its teaching Figure 1 is a plan of A, B, C three islands, C Island in the north side of A Island 50 ° east direction, Island B Island A in the north east 80 ° Direction, C Island in B Island north west 40 ° direction, from B Island to see A, C island perspective ∠ ABC