同学们都知道如何在数轴上找表示2的点,即以单位长1为边长,图1原点为一个顶点,在数轴上作正方形(如图1),因为OB=12+12=2,然后以对角线OB为半径,原点为圆心作弧,交数轴正方向于点A,则点A表示无理数2.那么,其他表示无理数的点又如何找呢?1.被开方数是正整数的无理数如3、5、6、7 The students all know how to find the point representing 2 on the number axis, that is, the unit length is 1 side length, the origin of figure 1 is a vertex, and the square is on the number axis (Figure 1), because OB=12+12=2, Then take the diagonal OB as the radius, the origin as the center of the arc, and the intersection of the axis and the positive direction at the point A, then the point A represents the irrational number 2. Then, how can the other points that represent the irrational number be found?1. The squared number is a positive integer Irrational numbers such as 3, 5, 6, 7