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Scope: Mathematics Request type: Paragraph
Condition 1: Contains text "横" Matched:8.
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算書 - Mathematics

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海島算經 - Hai Dao Suan Jing

[Three Kingdoms] 263
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9 海島算經:
今有登山臨邑,邑在山南。偃矩山上,令句高三尺五寸。令句端與邑東南隅及東北隅參相直。從句端遙望東北隅,入下股一丈二尺。又施句于入股之會,從立句端望西北隅,入句五尺。望東南隅,入下股一丈八尺。又設重矩于上,令矩間相去四丈。更從立句端望東南隅,入上股一丈七尺五寸。問邑廣長各幾何?
答曰:南北長一里一百步;東西廣一里三十三步、少半步。
術曰:以句高乘東南隅入下股,如上股而一,所得減句高,餘為法;以東北隅下股減東南隅下股,餘以乘矩間為實。實如法而一,得邑南北長也。求邑廣:以入句乘矩間為實。實如法而一,即得邑東西廣。

九章算術 - The Nine Chapters

[Western Han - Xin] 120 BC-20
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[Also known as: 《九章算經》]

勾股

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12 勾股:
今有戶不知高廣,竿不知長短。之不出四尺,從之不出二尺,邪之適出。問戶高、廣、袤各幾何?
答曰:廣六尺,高八尺,袤一丈。
術曰:從、不出相乘,倍,而開方除之。所得加從不出即戶廣,加不出即戶高,兩不出加之,得戶袤。

孫子算經 - Sunzi Suan Jing

[Northern and Southern (420 - 581)] Library Resources

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序:
孫子曰:夫算者,天地之經緯,群生之元首;五常之本末,陰陽之父母;星辰之建號,三光之表裹;五行之準平,四時之終始;萬物之祖宗,六藝之綱紀。稽群倫之聚散,考二氣之降升;推寒暑之迭運,步遠近之殊同;觀天道精微之兆基,察地理從之長短;采神祇之所在,極成敗之符驗;窮道德之理,究性命之情。立規矩,準方圓,謹法度,約尺丈,立權衡,平重輕,剖毫釐,析黍絫;歷億載而不朽,施八極而無疆。散之不可勝究,斂之不盈掌握。嚮之者富有餘,背之者貧且窶;心開者幼沖而即悟,意閉者皓首而難精。夫欲學之者必務量能揆己,志在所專。如是則焉有不成者哉。

卷上

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6 卷上:
凡筭之法,先識其位,一從十,百立千僵,千十相望,萬百相當。

Total 4 paragraphs. Page 1 of 1.