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本课内容是在学生学习了直线及角的认识的基础上教学的,是认识平行四边形和梯形的基础。垂直与平行是同一平面内两条直线的两种特殊的位置关系,在实际中有着广泛的应用。如何唤起学生已有的生活
The content of this course is based on the students’ knowledge of the straight lines and corners. It is the basis for understanding the parallelogram and trapezoid. Vertical and parallel are two special positions of two straight lines in the same plane, which has a wide range of applications in practice. How to arouse students’ existing life