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《三角形的内角和》是人教版四年级下册的教学内容,这部分内容是在学生学习了角的度量、角的分类、三角形的认识、三角形的分类的基础上进行教学的。掌握和探索“三角形内角和是180°”这个数学结论具有重要意义,它既是对三角形认识的深化,是进一步求出多边形内角和的基础,也是积累数学活动经验的过程。对如何进行“三角形内角和”的教学,进行了简单论述:一、我们的思考《三角形的内角和》是一节非常传统、经典的课,很多人都研
“Triangle and Triangle” is the fourth grade of PEP teaching content, this part is based on the students learn the measurement of angle, angle classification, the understanding of the triangle, based on the classification of triangles for teaching. It is of great significance to grasp and explore the mathematical conclusion that the angle of the interior of the triangle is 180 °. It is not only the deepening of understanding of the triangle, but also the basis for further finding the interior angle of the polygon and also the process of accumulating the experience of mathematical activity. A brief exposition of how to carry out the teaching of “the inner corner of the triangle and the inner corner of the triangle”: First, our thinking “The inner corner of the triangle” is a very traditional and classical lesson, and many people study