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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丙偕分餘線丙乙矩內。</
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">及甲丙上甲丁直角方形幷、
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等。</
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<
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">卽甲乙偕甲丙矩線內直
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形角</
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丁</
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自之冪四十九幷、等。</
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