Euclides 歐幾里得
,
Ji he yuan ben 幾何原本
,
1966
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(八七
[87]
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八七
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87
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rhead
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幾何原本 卷二
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xml:space
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">與元線偕兩分線、兩矩內直角形幷、等。</
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<
s
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<
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<
s
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xml:space
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">與甲乙偕甲丙、甲乙偕丙乙、兩矩線內直角形幷、等。</
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178
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xml:space
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">與甲戊、乙丁、平行。</
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<
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<
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等。</
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<
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<
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此兩形幷。</
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xml:space
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">試別作丁線。</
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<
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<
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">其甲乙線、旣任分於丙。</
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<
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<
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xml:id
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xml:space
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偕丁、丙乙偕丁、兩矩線內直角形幷、等。</
s
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<
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<
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