论文部分内容阅读
(4)三角形的中线什么是三角形的中线呢?三角形的中线是连结三角形的顶点和该顶点对边的中点的线段,这就是三角形的中线的定义.显然,三角形的中线在三角形的内部,如下图.
(4) What is the midline of the triangle? The midline of the triangle is the line connecting the vertices of the triangle and the midpoints of the vertices of the vertex. This is the definition of the midline of the triangle. Obviously, the midline of the triangle is inside the triangle. As shown below.