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)
30
(八)
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(七五
[75]
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七五
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幾何原本 卷一
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線。</
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丙
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/>
乙
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壬戊丁庚癸丑子辛己</
variables
>
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<
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<
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<
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<
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xml:space
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<
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<
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為餘方形。</
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<
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xml:space
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<
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<
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">則與乙角形等。</
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head
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-1
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<
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>
<
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">而方形角、有與所設角等。</
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>
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<
s
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">法曰。</
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>
<
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">設甲乙丙五邊形。</
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>
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>
<
s
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">求作平行方形、與五邊形等。</
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>
<
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">而有丁角。</
s
>
<
s
xml:id
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"
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">先分五邊形為甲、乙、丙、三三角形。
<
lb
/>
</
s
>
<
s
xml:id
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"
xml:space
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">次作戊己庚辛平行方形。</
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>
<
s
xml:id
="
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"
xml:space
="
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">與甲等。</
s
>
<
s
xml:id
="
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xml:space
="
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">而有丁角。</
s
>
<
s
xml:id
="
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xml:space
="
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">(</
s
>
<
s
xml:id
="
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xml:space
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">本篇四二</
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>
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<
s
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>
<
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">作庚辛壬癸平行 </
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>
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