Project Gutenberg 2008-10-20 Public domain in the USA. 191 Liu, Hui, active 3rd century-4th century 劉徽 海島算經 Hai Dao Suan Jing Wikipedia page about this book: https://en.wikipedia.org/wiki/Haidao_Suanjing Produced by Yvonne "海島算經" by active 3rd century-4th century Hui Liu is a mathematical treatise written during the early ancient period in China. This work primarily explores concepts of geometry and surveying, providing methodologies for calculating heights and distances through various practical problems. The content reflects the advancements in mathematical thought during this historical time. The book presents a series of problems related to surveying and measurement, utilizing visual observations and geometric principles to derive unknown quantities such as heights of islands, trees, and the dimensions of towns. For each scenario, it details a systematic approach to measurements, specifying how to align markers and employ calculations based on ratios derived from observed distances and heights. The solutions emphasize the use of simple multiplication and subtraction to arrive at precise measurements based on practical observations. Overall, "海島算經" serves as a foundational text, exemplifying the integration of mathematics with real-world applications in ancient China. (This is an automatically generated summary.) Reading ease score: 55.2 (10th to 12th grade). Somewhat difficult to read. zh Arithmetic -- Early works to 1900 AC QA Text Browsing: Encyclopedias/Dictionaries/Reference Browsing: Mathematics Category: Mathematics 33408 2025-06-11T07:46:05.751605 text/html 33229 2025-01-11T10:46:44.461435 text/html 81396 2025-06-11T07:46:10.322106 application/epub+zip 80291 2025-06-11T07:46:08.256105 application/epub+zip 67136 2025-06-11T07:46:07.180612 application/epub+zip 141774 2025-06-11T07:46:11.794115 application/x-mobipocket-ebook 136910 2025-06-11T07:46:09.706102 application/x-mobipocket-ebook 100625 2022-09-12T12:13:43.764666 application/x-mobipocket-ebook 25363 2025-06-11T07:46:05.531617 text/plain; charset=us-ascii 25227 2021-01-04T06:47:22 text/plain; charset=utf-8 9186 2021-01-04T06:47:22 text/plain; charset=utf-8 application/zip 17230 2025-06-11T07:46:11.930088 application/rdf+xml 10269 2025-06-11T07:46:07.722634 image/jpeg 2755 2025-06-11T07:46:07.446624 image/jpeg 79061 2025-06-11T07:46:05.757614 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog en.wikipedia