随着等腰三角形知识的学习,有关等腰三角形的问题,特别是有关等腰三角形的个数问题,初学者往往感到很棘手,具体计算中又常常“漏算”.下面就涉及到的有关问题,举例谈谈这类问题的解法.一般思路巧用圆规,有利于探求等腰三角形的个数问题.要解决好此类问题,只要通过巧用圆规画线段垂直平分线与辅助圆就可以防止“漏算”.如图1,已知点B在x轴上,点A在y轴上,且∠BAO=30°,在坐标轴上取一点P,使得△ABP是等 With the knowledge of isosceles triangle learning, the isosceles triangle problems, especially for the number of isosceles triangle, beginners often feel very tricky, and the specific calculation often Of the problems, for example, to talk about the solution of such problems.General ideas clever use of compasses, is conducive to explore the number of isosceles triangle.To solve these problems, as long as the use of compasses to draw a line of vertical bisector and auxiliary circle As shown in Figure 1, it is known that point B is on the x-axis, point A is on the y-axis, and ∠BAO = 30 °, taking a point P on the coordinate axis so that ΔABP is equal