Euclides 歐幾里得
,
Ji he yuan ben 幾何原本
,
1966
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0024
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二
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幾何原本 卷一之首
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xlink:href
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http://libcoll.mpiwg-berlin.mpg.de/libview?url=/mpiwg/online/permanent/library/02NT95YF/pageimg&mode=imagepath&pn=24
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">乙甲</
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s
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">線、有直、有曲。</
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<
s
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">凡線之界、是點。</
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<
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">凡線有界者。</
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n
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">第四界</
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<
s
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">凡直線止有兩端。</
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">兩端之間。</
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<
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">上下更無一點。</
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">兩點之間。</
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">至徑者直線也。</
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">稍曲則繞而長矣。</
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3
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<
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xml:space
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">丙乙甲己戊丁</
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>
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">直線之中。</
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<
s
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">點能遮兩界。</
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<
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">凡量遠近、皆用直線。</
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<
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">甲乙丙是直線。</
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<
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">甲丁丙、甲戊丙、甲己丙。</
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">皆是曲線。</
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">第五界</
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">面者。</
s
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<
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">止有長有廣。</
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>
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<
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">凡體之影極似於面。</
s
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">(</
s
>
<
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">無厚之極。</
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