Wucao Suanjing
Wucao suanjing (Mathematical Manual of the Five Administrative Departments) is one of the books in the collection of mathematical texts assembled by Li Chunfeng and collectively referred to as The Ten Computational Canons by later writers. The text was designed for the teaching of those entering the five government departments of agriculture, war, accounts, granary and treasury. There is a chapter relating to each one of these departments. The text contains some formulas to find the areas of different shapes of fields. Though the formulas give approximately correct answers, they are actually incorrect. This incorrectness motivated further mathematical work.[1] The mathematics involved does not go much beyond the processes of multiplication and division.
An approximation formula given in Wucao suanjing
Wucao suanjing contains an interesting approximate formula to find the area of a quadrilateral. This formula, known as "Surveyor's Rule" appears in the ancient mathematical lierature of Mesopotamia, Egypt, Europe, Arabia and India.[2] The formula can be stated thus:
- Area of a quadrilateral = (a+c)(b+d)/4 where a, b, c, d are the the lengths of the sides of the quadrilateral.[3]
References
- ^ J J O'Connor and E F Robertson. "History topic: The Ten Mathematical Classics". MacTutor History of Mathematics. Retrieved 3 December 2016.
- ^ R. C. Gupta. "Cultural Unity of Ancient Mathematics: the example of the Surveyor's Rule". History and Pedagogy of Mathematics News Letter. Retrieved 3 December 2016.
- ^ Helaine Selin (Editor) (2008). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2 ed.). Springer Science & Business Media. p. 178. ISBN 9781402045592.
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