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学习三角形中边、角不等关系,应该在理解有关定理的基础上,掌握相应的解题、证题方法.三角形中边、角不等关系主要有以下三条定理:1.三角形任何两边的和大于第三边;2.三角形的一个外角大于任何一个和它不相邻的内角;3.三角形中,大角(边)对大边(角).
In order to study the relationship between edges and angles in triangles, we should grasp the corresponding problem-solving and proof methods based on the understanding of the theorems. There are three theorems in the relationship between triangular edges and angles: 1. The sum of any two sides of the triangle Greater than the third side; 2. An outer corner of a triangle is larger than any inner corner that is not adjacent to it; 3. In a triangle, the big corner (edge) is opposite to the large edge (corner).