Euclides 歐幾里得
,
Ji he yuan ben 幾何原本
,
1966
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二二
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幾何原本 卷一
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">如所求。</
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<
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">其用法。</
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s
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">但以甲為心。</
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">作近丙一短界線。</
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">乙為心。</
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<
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">亦如之。</
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lb
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得丙。</
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