Euclides 歐幾里得
,
Ji he yuan ben 幾何原本
,
1966
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(一)
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(四)
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(五)
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(六)
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(七)
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(八)
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幾何原本 卷一
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<
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">甲乙丙、與丁丙乙、兩角形之乙丙底同。</
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variables
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">如云不然。</
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">令從甲別作直線、與乙丙平行。</
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">必在甲丁之上。</
s
>
<
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">或在其下矣。</
s
>
<
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">設在上、為甲戊。</
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>
<
s
xml:id
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xml:space
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">而乙
<
lb
/>
丁線、引出至戊卽作戊丙直線。</
s
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<
s
xml:id
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xml:space
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">是甲乙丙、宜與戊丙乙、兩角形等矣。</
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<
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xml:space
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">本篇卅七</
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>
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>
<
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">夫甲乙丙、與丁丙乙、旣等。</
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">而
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與戊丙乙、復等是全與其分等也。</
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">公論九</
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<
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">設在甲丁下、為甲己。</
s
>
<
s
xml:id
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xml:space
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">卽作己丙直線。</
s
>
<
s
xml:id
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xml:space
="
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">是己丙乙、與丁丙乙、亦等。</
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>
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