给定任意三角形,并做出三个旁心圆,如何用尺规作出一个原与旁心圆内切,与旁心圆b和c外切? 知乎 Template




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tomski给定任意三角形,并做出三个旁心圆,如何用尺规作出一个原与旁心圆内切,与旁心圆b和c外切? 知乎 coloring