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本课教学的主要内容是让学生直观地认识扇形,理解圆心角,感受扇形的大小与圆心角的大小有关。学生初步认识扇形,为后续扇形统计图的学习得体知识基础。
The main content of this course is to enable students to intuitively understand the fan shape, understand the central angle, the size of the fan experience the size of the central angle of the angle. Students initially understand the fan shape for the follow-up fan chart to learn appropriate knowledge base.