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)
25
(三)
26
(四)
27
(五)
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(六)
29
(七)
30
(八)
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幾何原本 卷一
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">則己戊丙庚、倍
<
lb
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大於甲戊丙矣。</
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<
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s
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<
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s
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">自相等。</
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<
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">解曰。</
s
>
<
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">甲乙丙丁方形。</
s
>
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">有甲丙對角線。</
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">題言兩旁之乙壬庚戊、與庚己丁辛、兩餘方形、</
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<
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">必等。</
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<
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">甲辛丁己丙壬乙戊庚</
variables
>
</
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">論曰。</
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>
<
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">甲乙丙、甲丙丁、兩角形等。</
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<
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<
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">甲戊庚、甲庚辛、兩角形亦等。</
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>
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<
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<
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">而於甲乙丙、減甲戊庚。</
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>
<
s
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">於甲丙
<
lb
/>
丁、減甲庚辛。</
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>
<
s
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xml:space
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">則所存乙丙庚戊、與庚丙丁辛、兩無法四邊形亦等矣。</
s
>
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