Euclides 歐幾里得
,
Ji he yuan ben 幾何原本
,
1966
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21
(一)
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(二)
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(三)
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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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<
s
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<
s
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">與他直線平行。</
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<
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<
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xml:space
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">庚辛乙壬甲己子戊丁癸丙</
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130
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<
s
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s
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<
s
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<
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<
s
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<
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甲乙、丙丁、兩直線。</
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<
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<
s
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<
lb
/>
丙丁、亦平行。</
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<
p
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<
s
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s
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<
s
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">試作庚辛直線。</
s
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<
s
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s
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<
s
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">甲乙於壬。</
s
>
<
s
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<
lb
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於子。</
s
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<
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">丙丁於癸。</
s
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<
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">其甲乙、與戊己、旣平行。</
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>
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">卽甲壬子、與
<
lb
/>
相對之己子壬、兩內角等。</
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>
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<
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>
<
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s
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<
s
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<
lb
/>
</
s
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<
s
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">卽丁癸子內角、與己子壬外角、亦等。</
s
>
<
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>
<
s
xml:id
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>
<
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xml:id
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xml:space
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s
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<
s
xml:id
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xml:space
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<
lb
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甲壬子。</
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<
s
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">亦為相對之內角。</
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<
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<
s
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<
s
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<
lb
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平行線。</
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<
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<
s
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<
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head
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-1
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<
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<
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<
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<
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s
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<
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">任指一處、作直線、為甲丁。</
s
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<
s
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">卽乙丙線上成甲
<
lb
/>
丁乙角。</
s
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<
s
xml:id
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">次於甲點上作一角。</
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<
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<
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<
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<
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<
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s
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<
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s
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<
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