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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(一〇二
[102]
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幾何原本 卷二
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形之丙為直角。</
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xml:space
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<
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xml:space
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角方形、自相等。</
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戊庚己角形之庚為直角。</
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兩直角方形幷、等。</
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<
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上直角方形。</
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。</
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<
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角方形幷、也。</
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幷。</
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<
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">又等於甲丁、丁己、上兩直角方形、幷。</
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<
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<
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<
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<
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">則甲丁、丁己、上兩直角
<
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方形、幷。</
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">亦倍大於甲丙、丙丁、上兩直角方形、幷矣。</
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</
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<
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<
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形、幷也。</
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九。</
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<
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<
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