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三角形是最基本的几何图形,是研究复杂几何图形的基础,许多几何问题都可以转化为三角形的问题来解决,常用到的数学思想包括{数形结合思想、方程思想、转化思想和分类讨论思想.一、数学思想方法(一)方程思想三角形三边关系最后是转化为边与边的和或差的不等式,三角形内角和、外角和为我们提供了联系已知和未知的等量关系式,勾股定理给出的结论也是个等式,故这些知识
The triangle is the most basic geometric figure. It is the basis for the study of complex geometric figures. Many geometric problems can be solved by solving the problems of triangles. The commonly used mathematical ideas include the combination of number and shape, equations, ideas and thoughts 1. Mathematical Thinking Methods (1) Equation The triangular trilateral relationship is finally transformed into an inequality of the sum or difference of the edges and edges. The triangular inner angle and the outer angle sum provide us with the relationship between the known and the unknown. The conclusion given by the Pythagorean theorem is also an equation, so this knowledge