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  2. Zhoubi Suanjing - Wikipedia

    en.wikipedia.org/wiki/Zhoubi_Suanjing

    A large part of this involves analysis of solar declination in the Northern Hemisphere at various points throughout the year. [ 1 ] At one point during its discussion of the shadows cast by gnomons, the work presents a form of the Pythagorean theorem known as the gougu theorem ( 勾股 定理 ) [ 14 ] from the Chinese names—lit. 'hook' and ...

  3. Pythagorean trigonometric identity - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_trigonometric...

    In this way, this trigonometric identity involving the tangent and the secant follows from the Pythagorean theorem. The angle opposite the leg of length 1 (this angle can be labeled φ = π/2 − θ) has cotangent equal to the length of the other leg, and cosecant equal to the length of the hypotenuse. In that way, this trigonometric identity ...

  4. File:Illustration to Euclid's proof of the Pythagorean ...

    en.wikipedia.org/wiki/File:Illustration_to_Euclid...

    2008-05-20T00:47:20Z Jokes Free4Me 500x540 (13967 Bytes) {{Information |Description=Illustration to Euclid's proof of the Pythagorean theorem, including less important labels and lines. |Source=[[:Image:Illustration to Euclid's proof of the Pythagorean theorem.svg]] |Date=May 20, 2; Uploaded with derivativeFX

  5. File:Pythagorean.svg - Wikipedia

    en.wikipedia.org/wiki/File:Pythagorean.svg

    English: Illustration of the Pythagorean theorem. The sum of two squares whose sides are the two legs (blue and red) is equal to the area of the square whose side is the hypotenuse (purple). The sum of two squares whose sides are the two legs (blue and red) is equal to the area of the square whose side is the hypotenuse (purple).

  6. Pythagorean theorem - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_theorem

    In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle.It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides.

  7. Timeline of ancient Greek mathematicians - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_ancient_Greek...

    Thales of Miletus (c. 624/623 – c. 548/545 BC) is the first known individual to use deductive reasoning applied to geometry, by deriving four corollaries to Thales' theorem. [1] Pythagoras (c. 570 – c. 495 BC) was credited with many mathematical and scientific discoveries, including the Pythagorean theorem, Pythagorean tuning, the five ...

  8. Mathematical beauty - Wikipedia

    en.wikipedia.org/wiki/Mathematical_beauty

    A great many theorems of mathematics, when first published, appear to be surprising; thus for example some twenty years ago [from 1977] the proof of the existence of non-equivalent differentiable structures on spheres of high dimension was thought to be surprising, but it did not occur to anyone to call such a fact beautiful, then or now. [10]

  9. Berlin Papyrus 6619 - Wikipedia

    en.wikipedia.org/wiki/Berlin_Papyrus_6619

    [7] The interest in the question may suggest some knowledge of the Pythagorean theorem, though the papyrus only shows a straightforward solution to a single second degree equation in one unknown. In modern terms, the simultaneous equations x 2 + y 2 = 100 and x = (3/4) y reduce to the single equation in y : ((3/4) y ) 2 + y 2 = 100 , giving the ...

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