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旋转变换大致有三种类型:一是通过旋转将线段或角转移,形成特殊三角形;二是通过旋转集中线段、角、三角形等图形;三是通过线段中点旋转180°,构造中心对称型全等图形.本文意在通过几个例子,帮助同学们体会如何利用旋转来解决问题.一、利用旋转将线段或角转移,形成特殊三角形如果题目中一些几何元素比较分散,而又有共端点的等线段图形,就可以考虑将某个三角形旋转一定度数,形成特殊的三角形,
There are basically three types of rotation transformations: one is to rotate the line segment or angle to form a special triangle; the other is to rotate the line, angle, triangle and other graphics; the other is to rotate the midpoint of the line segment by 180 ° to construct a center symmetric congruent This article is intended to help students through a few examples to understand how to use rotation to solve the problem. First, the use of rotation to shift the line or angle to form a special triangle If the subject of some of the geometric elements are scattered, Line segment graphics, you can consider a certain degree of rotation of a certain number of triangles to form a special triangle,