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)
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(八)
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幾何原本 卷二
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<
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<
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<
s
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<
lb
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線。</
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<
s
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<
s
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<
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己、丙壬、皆直角方形。</
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s
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<
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<
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上直角方形也。</
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<
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<
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線內也。</
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<
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<
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/>
甲丙、矩線內也。</
s
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<
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xml:id
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xml:space
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<
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>
<
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<
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<
s
xml:id
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">及丙壬直角方形、幷。
<
lb
/>
</
s
>
<
s
xml:id
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">本與甲丁直角方形等。</
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>
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s
>
<
s
xml:id
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">加一丙壬直角
<
lb
/>
方形。</
s
>
<
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">卽與甲丁直角方形、加一辛己直角方形、等矣。</
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<
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xml:space
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">則甲乙、甲丙、矩線內直角形二、及丙乙上直角方
<
lb
/>
形、幷。</
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<
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<
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<
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