�们知道三角形一边上的中线将这个三角形分成两个面积相等的三角形.如图1ad是 Abc边bc上的中线则s Abd=s Acd1如图2 Template




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tomski�们知道三角形一边上的中线将这个三角形分成两个面积相等的三角形.如图1ad是 abc边bc上的中线则s abd=s coloring