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 卷一之首
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<
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<
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s
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<
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s
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<
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<
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<
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<
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<
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<
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角。</
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<
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">若言甲乙丁。</
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<
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<
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<
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">界者。</
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<
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">或在一界、或在多界之間。</
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<
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">如平圜、立圜等物。</
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<
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">如平方、立方、及平立、三角、六、八角等物。</
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<
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">圜者一形於平地居一界之間。</
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<
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<
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<
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<
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丁、丙至丁其線俱等。</
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