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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幾何原本 卷二
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xml:space
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<
s
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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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等。</
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<
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">則甲己直角形。</
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">乙丁、與甲乙、旣等。</
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>
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">則丙丁直角形。</
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">在甲乙、丙乙、矩線內。</
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<
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">而
<
lb
/>
此兩形幷。</
s
>
<
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xml:space
="
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">與甲丁直角方形等。</
s
>
</
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<
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<
s
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">試別作丁線。</
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<
s
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">與甲乙等。</
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<
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">其甲乙線、旣任分於丙。</
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xml:space
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">則甲乙偕丁、矩線內直角形。</
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<
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<
s
xml:id
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<
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<
s
xml:id
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xml:space
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/>
偕丁、丙乙偕丁、兩矩線內直角形幷、等。</
s
>
<
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xml:id
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<
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