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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<
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線丙丁上、兩直角方形幷。</
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<
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己庚線。</
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<
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<
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兩角亦等。</
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<
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<
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">又戊庚己角形
<
lb
/>
之戊庚己角。</
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<
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<
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<
s
xml:id
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<
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/>
己、庚己戊、兩角等。</
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xml:space
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<
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<
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