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三角形中位线定理是在学习了三角形基本性质,三角形全等关系后,由平行线等分线段定理及推论为基础而推导出来的,它是对三角形性质的更为深刻的
The triangle median line theorem is derived from the parallel line bisector theorem and inference after learning the basic properties of the triangle and the triangle congruence relation. It is more profound to the nature of triangles.