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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: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).

  5. 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.

  6. Garfield's proof of the Pythagorean theorem - Wikipedia

    en.wikipedia.org/wiki/Garfield's_proof_of_the...

    Garfield's proof of the Pythagorean theorem is an original proof the Pythagorean theorem discovered by James A. Garfield (November 19, 1831 – September 19, 1881), the 20th president of the United States. The proof appeared in print in the New-England Journal of Education (Vol. 3, No.14, April 1, 1876).

  7. 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]

  8. 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

  9. Timeline of ancient Greek mathematicians - Wikipedia

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

    Pythagoras (c. 570 – c. 495 BC) was credited with many mathematical and scientific discoveries, including the Pythagorean theorem, Pythagorean tuning, the five regular solids, the Theory of Proportions, the sphericity of the Earth, and the identity of the morning and evening stars as the planet Venus.

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