尺规作图解答平面几何问题06——如图, Abc中,ab=ac,d,e在bc上,be=2de,da=dc,作bf⊥ae于f,求证:cf=ab 知乎 Template




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tomski尺规作图解答平面几何问题06——如图, abc中,ab=ac,d,e在bc上,be=2de,da=dc,作bf⊥ae于f,求证:cf=ab 知乎 coloring