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以B為圓心,m為半徑作圓.任意取一條直徑,記為DE,使用圓規在圓上取DF=h,連結DF,EF.過B作直線BG使得BG‖EF,在直線BG上截取線段BC使得BC=a,連結CD並延長,用圓規在CD的延長線上截取DA使得DA=DC,連結AB,就作好了三角形ABC…
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