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)
25
(三)
26
(四)
27
(五)
28
(六)
29
(七)
30
(八)
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(四一
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四一
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幾何原本 卷一
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其分等也。</
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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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xml:space
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<
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">各等。</
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88
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<
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</
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<
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<
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">論曰。</
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<
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<
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<
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<
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<
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">至丙丁線上。</
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>
<
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">則甲戊丙、甲
<
lb
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89
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0063-02
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<
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>
</
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戊丁、兩角、與兩直角等。</
s
>
<
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<
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<
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echoid-s1993
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<
s
xml:id
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">如此。</
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<
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xml:id
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<
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">亦與甲戊丁、甲戊
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丙兩角等。</
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<
s
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>
<
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echoid-s1999
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">)</
s
>
<
s
xml:id
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N11F02
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">試減同用之甲戊丁角。</
s
>
<
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xml:id
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xml:space
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">其所存丁戊乙、甲戊丙、兩角必等。</
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<
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xml:id
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<
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三</
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<
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">)</
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<
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">又丁戊線、至甲乙線上。</
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>
<
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xml:space
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">則甲戊丁、丁戊乙、兩角、與兩直角等。</
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>
<
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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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/>
</
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<
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">至丙丁線上。</
s
>
<
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xml:id
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">則丁戊乙、丙戊乙、兩角、與兩直角等。</
s
>
<
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<
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<
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<
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xml:id
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<
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">卽甲戊丁、丁戊
<
lb
/>
乙、兩角、亦與丁戊乙、丙戊乙、兩角等。</
s
>
<
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<
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<
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<
s
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<
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