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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乙庚線。</
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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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">與甲丙、兩線等。</
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<
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<
s
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">又寅辛、與丙乙、兩線等。</
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<
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為丙乙上直角方形。</
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<
s
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<
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<
s
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">又乙辛、辛己、兩線。</
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">亦各與丙乙等。</
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<
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">而甲辛、子己、兩直角形。</
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<
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<
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甲乙、丙乙、矩線內。</
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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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">亦各在甲乙、丙乙、矩線內。</
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<
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<
s
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">與丙乙、乙丁等。
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</
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<
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<
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<
s
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<
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">而每加一癸庚。</
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<
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<
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<
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