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古人云:“人谁无过,过而能改,善莫大焉.”这句话出自《左传·宣公二年》,是指一个人犯了错误后,能够认识并改正错误,就是最好的事情.在数学学习中,犯错无法避免,我们应该正视错误、找到原因、严谨思维,以达到规避错误的目的.我们以“轴对称图形”一章为例,对这一章常见的错误进行举例分析,探索个中就里,实现触类旁通.一、概念把握不准确例1到三角形的三个顶点距离相等的点是().A.三条角平分线的交点B.三条中线的交点C.三条高的交点D.三条边的垂直平分线的交点【错解】A.【分析】线段垂直平分线的性质定理
The ancients said: “people who have had, but can change, good Mo Yan.” This sentence from “Zuo Xuan Gong two years,” refers to a person made a mistake, to recognize and correct the mistake, it is best In mathematics learning, mistakes can not be avoided, we should face the mistakes, find the reason, rigorous thinking, in order to achieve the purpose of avoiding mistakes.We “axisymmetric graphics” chapter, for example, common to this chapter Error analysis of an example, to explore one in, to achieve analogy bypass. First, the concept of inaccurate grasp Example 1 triangle to the three vertices of the same distance from the point () .A. The intersection of the three angle bisector B. The intersection of the three lines C. Three high intersection D. The intersection of the vertical bisector of the three sides [wrong solution] A. [Analysis] The nature of the line segment bisector theorem