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Another quote from the same book ("Science of the Sacred") about Shulba Sutras (https://en.wikipedia.org/wiki/Shulba_Sutras):

"Although Vedic mathematicians are known primarily for their computational genius in arithmetic and algebra, the basis and inspiration for the whole of Indian mathematics is geometry. Evidence of geometrical drawing instruments from as early as 2,500 B.C.E has been found in the Indus Valley. The beginnings of algebra can be traced to the constructional geometry of the Vedic priests, which are preserved in the Shulba Sutras. Exact measurements, orientations, and different geometrical shapes for the altars and arenas used for the religious functions (yajnas), which occupy an important part of the Vedic religious culture, are described in the Shulba Sutras. Many of these calculations employ the geometrical formula known as the Pythagorean Theorem.

This Theorem (c. 540 B.C.E.) equating the square of the hypotenuse of a right angle triangle with the sum of the squares of the other two sides, was utilized in the earliest Shulba Sutras (the Baudhayana) prior to the eighth century B.C.E. Thus, widespread use of this famous mathematical theorem in India, several centuries before its being popularized by Pythagoras, has been documented.

The exact wording of the theorem as presented in the Shulba Sutras is: "The diagonal chord of the rectangle makes both the squares that the horizontal and vertical sides make separately". The proof of this fundamentally important theorem is well known from Euclid's time until the present for its excessively tedious and cumbersome nature; yet the Vedas present five different extremely simple proofs for this theorem. One historian, Needham, has stated: "Future research on the history of science and technology in Asia will in fact reveal that the achievements of these peoples contribute far more in all pre-Renaissance periods to the development of world science than has yet been realized.""



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