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三角形的中线和中位线是三角形中的两条重要线段,也是初中几何中两个易混的概念(concept),可从下面几个方面区分. 一、从定义上区分在三角形中,连结一个顶点及其对边中点的线段叫做三角形的中线;连结三角形两边中点的线段叫做三角形的中位线.三角形有三条中线,三条中线相交于一点,叫做三角形的重心.三角形也有三条中位线,
The triangle’s midline and median line are the two important line segments in the triangle. It is also the concept of two miscellaneous concepts in junior high school geometry. It can be distinguished from the following aspects. First, distinguish from the definition in the triangle, linking one The line segment of the vertex and its opposite midpoint is called the triangle’s midline; the line joining the two midpoints of the triangle is called the triangle’s median line. The triangle has three midlines, and the three midlines intersect at a point called the center of gravity of the triangle. The triangle also has three median lines. ,