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# Pythagorean theorem

noun, Geometry.
1.
the theorem that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
Origin of Pythagorean theorem
1905-1910
First recorded in 1905-10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for Pythagorean theorem
Historical Examples
• The name is applied by the French to the Pythagorean theorem.

David Eugene Smith
• The Pythagorean theorem, as it is generally called, has had other names.

David Eugene Smith
• This is not available at this time, however, because the Pythagorean theorem has not been proved.

David Eugene Smith
• These two propositions are usually proved by the help of the Pythagorean theorem.

David Eugene Smith
• In fact, without the concept of the square root, not even the Pythagorean theorem can be fully grasped.

John Frederick Herbart
Pythagorean theorem in Science
 Pythagorean theorem   (pĭ-thāg'ə-rē'ən)    A theorem stating that the square of the length of the hypotenuse of a right triangle is equal to the sum of the squares of the lengths of the other sides. It is mathematically stated as c2 = a2 + b2, where c is the length of the hypotenuse and a and b the lengths of the other two sides.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Pythagorean theorem in Culture
Pythagorean theorem [(puh-thag-uh-ree-uhn, peye-thag-uh-ree-uhn)]

The theorem in geometry that, in a triangle with one right angle, usually called a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.

Note: The theorem is often expressed a2 + b2 = c2.
Note: The simplest whole number expression of this theorem is called the 3, 4, 5 triangle. In a right triangle, if one side measures three units, and the second side measures four units, the hypotenuse must measure five units because 32 + 42 = 52; that is, 9 + 16 = 25.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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