新课标人教版小学数学四年级下册《三角形的内角和》精品教案

核准通过，归档资料。未经允许，请勿外传新课标人教版小学数学四年级下册三角形的内角和精品教案教学目标1、让学生亲自动手，通过量、剪、拼等活动发现三角形内角和是180，并会应用这一知识解决生活中简单的实际问题。2、让学生在动手获取知识的过程中，渗透“转化”数学思想，掌握简单的数学推理方法，培养学生的创新意识、探索精神和实践能力。3、让学生感受到数学的价值，体会成功的喜悦，激发学生主动学习数学的兴趣。教学重点让学生经历“三角形内角和是180度”这一知识的发现过程。教学准备教具多媒体课件学具锐角三角形、直角三角形、钝角三角形各一个、量角器、剪刀。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教学过程一、创设情境，生成问题1、师同学们喜欢猜谜语吗老师这里有一个谜语，请看大屏幕猜谜语（课件）形状似座山,稳定性能坚三竿首尾连,学问不简单打一几何图形（学生回答），大家猜的可真准。课件显示三角形，板书三角形2、师关于三角形，你都掌握了哪些知识（指名回答学过的三角形的知识）看来大家对三角形已经非常熟悉了，刚才有同学说三角形有三个角，谁能上来指一指是哪三个角（学生上前面来指角）非常好，三条线段围成三角形后，在三角形内形成了三个角，（课件分别闪烁三个角的弧线），我们把三角形里面的这三个角叫做三角形的内角。（课件出示“内角”）今天我们就来研究有关三角形内角的知识。（把课题补充完整）3、学生齐读课题，师看了这个课题，你想提出什么问题吗（预设）生内角和是什么意思三角形的内角和是多少度师相信通过下面的学习，你能获得答案。二、探索交流，解决问题（一）特殊直角三角形内角和1、师我们来继续看大屏幕（课件出示一副三角板）这是我们常用的学习工具三角板，它的外形是什么形状的（学生回答，课件抽象出三角形）根据我们以