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三角形的中线是三角形中的重要线段,有着许多的性质和用法,在各级各类竞赛中时常出现涉及三角形中线的题目.本文从中分类采撷几例.一、运用三角形的中线等分三角形的面积解题我们知道三角形的每一条中线分三角形为面积相等的两个三角形.所以当面积问题中出现线段的中点时,可尝试寻找相应的三角形及中线,运用该性质解题.例年全国初中数学竞赛)点
The middle line of the triangle is an important line segment in the triangle, which has many properties and usages. In all kinds of competitions at all levels, there are often problems involving the middle line of the triangle.This paper classifies the picks of several cases.First, using the triangle’s midline to divide the area of the triangle Problem solving We know that each triangle in the middle of the triangle is divided into triangles for the same area of the two triangles. So when the area appears in the middle of the line segment, you can try to find the corresponding triangle and the center line, the use of the nature of problem-solving. Contest) point