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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(四二
[42]
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四二
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幾何原本 卷一
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xlink:href
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戊丁、丙戊乙、兩角必等。</
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<
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">而所作甲丙戊、丁丙乙、兩交角等。
<
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</
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<
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xml:space
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">而甲丙戊、戊丙乙、與兩直角等。</
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<
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<
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丙乙、戊丙乙。</
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<
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<
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<
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相對之內角甲乙丙。</
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<
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十</
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<
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<
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<
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<
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<
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