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海島算經
目錄
《海島算經》
Source: CHANT
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Edition:
Generated from the CHANT textfiles in Kanripo format on 2018-10-06
Catalog category:
天文算法類
Dates:
(Category not assigned)
9999
Textlength:
1530 characters.
Comment:
Wikidata:
WD
References:
《海島算經》
line / %
《海島算經》
海島算經
今有望海島,
立兩表,
齊高三丈,
前後相去千步,
令後表與前表參相直。
從前表卻行一百二十三步,
人目著地,
取望島峰,
與表末參合。
從後表卻行一百二十七步,
人目著地,
取望島峰,
亦與表末參合。
問:
島高及去表各幾何?
答曰:
島高四里五十五步,
去表一百二里一百五十步。
術曰:
以表高乘表間,
為實。
相多為法。
除之,
所得加表高,
即得島高。
求前表去島遠近者,
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