# Pythagorean theorem/Related Articles  Main Article Discussion Related Articles  [?] Bibliography  [?] External Links  [?] Citable Version  [?] A list of Citizendium articles, and planned articles, about 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 of America, 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]