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教学目标:1.认识圆的圆心和半径,知道同圆中半径的特点。2.初步学会用圆规画圆的方法。3.通过让学生经历形成圆的过程加深学生对圆心和半径的感悟与认识。4.在具体的认识圆活动中使学生体会数学与生活的联系,感受数学美。教学重点:通过操作活动认识圆的圆心和半径。教学难点:初步学会用圆规画圆的方法。
Teaching objectives: 1. Know the circle center and radius, with the circle of the radius of the characteristics. 2. Preliminary learn how to use the compass method. 3. Enhance students’ perception and understanding of the center and radius by letting students experience the process of forming a circle. 4 in the specific circle of understanding activities to enable students to understand the connection between mathematics and life, feel the beauty of mathematics. Teaching points: Through the operation of awareness of the circle center and radius. Difficulties in teaching: a preliminary understanding of the method of drawing a circle with a compass.