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我们学过的各知识点常常都是紧密联系的,下面就跟着喻老师来看看用方程的思想来解决求角度问题.在学习相交线与平行线时,经常会遇到一类求角度的问题.此类问题涉及的知识点有相交线(对顶角),平行线(内错角、同位角、同旁内角),角平分线(两角相等),垂线(直角)等.由于其图形中直线、射线、线段及角较多,常使初学者感到眼花缭乱,无从下手.此时,若从代数的角度出发,通过设未知数,利用问题中的相等关系建立方程求解,
We have learned all the knowledge points are often closely linked, following the teacher followed Yu to see the use of equations to solve the problem of seeking perspectives.In the study of intersecting lines and parallel lines, often encounter a class of seeking perspective The problems involved in this kind of problem are the intersection of the line of intersection (apex angle), the parallel lines (the angle of misalignment, the angle of co-ordination, the angle of the same side), the angle bisector (the angle of the two corners), the perpendicular At the moment, if algebraic point of view, through the establishment of unknown, the use of equal relations in the problem to establish the equation to solve,