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 卷一
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<
s
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s
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<
s
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<
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<
s
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">於丙點求作一角。</
s
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s
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s
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<
s
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">先於戊丁線。</
s
>
<
s
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">任取一點、為庚。</
s
>
<
s
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">於戊己線。</
s
>
<
s
xml:id
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">任取一點、為辛。
<
lb
/>
</
s
>
<
s
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">自庚至辛、作直線。</
s
>
<
s
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">次依甲乙線、作丙壬癸角形。</
s
>
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s
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xml:space
="
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">與戊庚辛角形等。</
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">(</
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>
<
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">本篇廿二</
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s
>
<
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">卽丙壬、丙癸兩腰。</
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>
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">與戊庚、戊辛、
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lb
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兩腰等。</
s
>
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s
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="
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">壬癸底、與庚辛底、又等。</
s
>
<
s
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="
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">則丙角、與戊角、必等。</
s
>
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">(</
s
>
<
s
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xml:space
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">本篇八。</
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>
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