过图形重心的直线平分面积吗?平分面积的直线过重心吗?本文利用物理学中的物体平衡时力矩相等原理,得到否定的回答,同时得到一种确定图形重心位置的一个方法.在一次听课中,出现一个教学片断:“画一条直线,把图1的面积两等分”.教师在教学中引导学生得出下列三种方案:图2中的直线a、b、c,进一步得出各种方案下都可画许多直线,如将直线a绕MN的 Have you got a negative answer and got a way to determine the location of the center of gravity of the graph? At a single lecture, take a straight line over the centroid of the graph’s center of gravity? , There is a teaching piece: “draw a straight line, the area of ​​Figure 1, two equal points.” Teachers in teaching guide students to come to the following three programs: Figure 2, a, b, c, Under a variety of programs can draw many straight lines, such as a straight line around MN MN