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  2. 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.

  3. Xuan tu - Wikipedia

    en.wikipedia.org/wiki/Xuan_tu

    Xuan tu or Hsuan thu (simplified Chinese: 弦图; traditional Chinese: 絃圖; pinyin: xuántú; Wade–Giles: hsüan 2 tʻu 2) is a diagram given in the ancient Chinese astronomical and mathematical text Zhoubi Suanjing indicating a proof of the Pythagorean theorem. [1] Zhoubi Suanjing is one of the oldest Chinese texts on mathematics. The ...

  4. File:Academ Jigsaw puzzle and mnemonic for the Pythagorean ...

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

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  5. Bride's Chair - Wikipedia

    en.wikipedia.org/wiki/Bride's_Chair

    The Bride's chair proof of the Pythagorean theorem, that is, the proof of the Pythagorean theorem based on the Bride's Chair diagram, is given below. The proof has been severely criticized by the German philosopher Arthur Schopenhauer as being unnecessarily complicated, with construction lines drawn here and there and a long line of deductive ...

  6. Zhoubi Suanjing - Wikipedia

    en.wikipedia.org/wiki/Zhoubi_Suanjing

    The Zhoubi Suanjing, also known by many other names, is an ancient Chinese astronomical and mathematical work.The Zhoubi is most famous for its presentation of Chinese cosmology and a form of the Pythagorean theorem.

  7. Pythagorean trigonometric identity - Wikipedia

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

    The Pythagorean trigonometric identity, also called simply the Pythagorean identity, is an identity expressing the Pythagorean theorem in terms of trigonometric functions. Along with the sum-of-angles formulae , it is one of the basic relations between the sine and cosine functions.

  8. Power of a point - Wikipedia

    en.wikipedia.org/wiki/Power_of_a_point

    Due to the Pythagorean theorem the number () has the simple geometric meanings shown in the diagram: For a point outside the circle () is the squared tangential distance | | of point to the circle . Points with equal power, isolines of Π ( P ) {\displaystyle \Pi (P)} , are circles concentric to circle c {\displaystyle c} .

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

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

    Date/Time Thumbnail Dimensions User Comment; current: 20:44, 19 December 2006: 500 × 540 (6 KB): Gerbrant: Changed PQR to ABC, in line with the article (and Euclid, although he uses Greek letters of course).

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