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# Pythagorean theorem/Related Articles  Main Article Talk Related Articles  [?] Bibliography  [?] External Links  [?] Citable Version  [?] A list of Citizendium articles, and planned articles, about Pythagorean theorem.
See also changes related to Pythagorean theorem, or pages that link to Pythagorean theorem or to this page or whose text contains "Pythagorean theorem".

## Bot-suggested topics

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• Biot-Savart's law [r]: Add brief definition or description
• Euclid's Elements [r]: Mathematical and geometric treatise consisting of 13 books written by the Greek mathematician Euclid in Alexandria circa 300 BC. [e]
• Irrational number [r]: A real number that cannot be expressed as a fraction, m / n, in which m and n are integers. [e]
• James Garfield [r]: The 20th President of the United States, serving in 1881, and a Republican U.S. Congressman from Ohio. [e]
• Law of cosines [r]: Mathematical statement about a general triangle which relates the lengths of its sides to the cosine of one of its angles. [e]
• Mathematics [r]: The study of quantities, structures, their relations, and changes thereof. [e]
• Pythagoras [r]: Greek mathematician and thinker of the 6th century BCE. [e]
• Rectangle [r]: A four-sided plane figure with four right angles. [e]
• Sine [r]: In a right triangle, the ratio of the length of the side opposite an acute angle (less than 90 degrees) and the length of the hypotenuse. [e]
• Square [r]: Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Square (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.
• Trigonometric function [r]: Function of an angle expressed as the ratio of two of the sides of a right triangle that contains that angle; the sine, cosine, tangent, cotangent, secant, and cosecant. [e]