本文以人教版八年级(上)《多边形的内角和》为例,说明在数学课堂教学中如何培养学生的思维能力,促进学生真正理解数学,热爱数学.一、提出有思维价值的问题问题1同学们都知道多边形的内角和等于(n-2)·180°,而且也熟悉了课本中是借助多边形的对角线将多边形分割成若干个三角形得出的.那么,除了课本中的这种方法外,我们还有没有其他的方法,也能证得这一结论呢?问题2课本中为什么是过多边形的任意一顶点作它的对角线呢?这样做的目的是 In this paper, the eighth grade (PEP) “polygonal angle and” as an example to illustrate how to cultivate students’ thinking skills in mathematics classroom teaching, to promote students to truly understand mathematics, love mathematics. 1 The students all know that the polygon’s interior angle is equal to (n-2) · 180 °, and it is also familiar with textbooks that use the diagonal of the polygon to divide the polygon into triangles. How else can we conclude this conclusion by asking for a solution to this problem? Question 2 Why is the diagonal of any vertex of a polygon in the textbook? The purpose of doing so is