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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(七九
[79]
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幾何原本 卷一
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甲丙丁、與乙丙辛、兩角亦等。</
s
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<
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乙戊、與丙乙己、兩角復等。</
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直角方形。</
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<
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戊底、同在平行線內之甲乙戊角形。</
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<
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與丙丁癸子直角形、等。</
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<
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">一增。</
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">凡直角方形之對角線上。</
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>
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">作直角方形。</
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s
>
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s
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>
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s
xml:id
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xml:space
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">作直角
<
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/>
方形。</
s
>
<
s
xml:id
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xml:space
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">倍大於甲乙丙丁形。</
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