This shows grade level based on the word's complexity.

# Pythagorean theorem

Save This Word!

This shows grade level based on the word's complexity.

noun Geometry.

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.

QUIZ

ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?

We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.

Question 1 of 8

Which of the following words describes “sky blue”?

Meet Grammar CoachImprove Your Writing

## Origin of Pythagorean theorem

First recorded in 1905–10

## Words nearby Pythagorean theorem

Pythagoras, Pythagoras' theorem, Pythagorean, Pythagoreanism, Pythagorean scale, Pythagorean theorem, Pytheas, Pythia, Pythiad, Pythian, Pythian Games

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

## How to use Pythagorean theorem in a sentence

A Musical Fantasy With Steven Mackey, “Shivaree,” & Other Words Of The Day

Why Do “Left” And “Right” Mean Liberal And Conservative?

“Epidemic” vs. “Pandemic” vs. “Endemic”: What Do These Terms Mean?

What Is The Difference Between “It’s” And “Its”?

Why “Misinformation” Was Dictionary.com’s 2018 Word Of The Year

11 Most Common Types of Adjectives

## Scientific definitions for Pythagorean theorem

Pythagorean theorem

[ pĭ-thăg′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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## Cultural definitions for Pythagorean theorem

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.

## notes for Pythagorean theorem

The theorem is often expressed a2 + b2 = c2.

## notes for Pythagorean theorem

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 Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.