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知道什么是圆的圆心、半径和直径;能借助工具画图,能用圆规画指定大小的圆;使学生在观察、操作、画图等活动中感受并发现圆的有关特征,能应用圆的知识解释一些日常生活现象。使学生在活动中进一步积累认识图形的学习经验,增强空间观念,发展数学思考。使学生进一步体验图形与生活的联系,感受平面图形的学习价值,提高数学学习的兴趣和爱好数学的自信心。
Know what is the center of the circle, radius and diameter; can draw a circle with the help of tools to specify the size of the circle; enable students to observe and manipulate, drawing and other activities to find and find the relevant characteristics of the circle, the circle can explain the use of knowledge Some daily life phenomenon. So that students in the activities of further accumulation of understanding of graphics learning experience, enhance the concept of space, the development of mathematical thinking. Make students further experience the connection between graphic and life, experience the learning value of graphic, improve the interest of mathematics learning and love the self-confidence of mathematics.