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每種畫法都不一樣,如下是三角形的例子. 已知:三角形ABC求作:三角形ABC=三角形DEF畫射線DG以D為圓心,BC長為半徑畫弧,交射線DG於E以D為圓心AB長為半徑畫弧,以E為圓心,AC長為半徑畫弧,兩弧交於F點連接FD、FE
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