Pythagorean theorem

noun

Definition of Pythagorean theorem

: a theorem in geometry: the square of the length of the hypotenuse of a right triangle equals the sum of the squares of the lengths of the other two sides

First Known Use of Pythagorean theorem

1743, in the meaning defined above

Keep scrolling for more

Learn More About Pythagorean theorem

Time Traveler for Pythagorean theorem

Time Traveler

The first known use of Pythagorean theorem was in 1743

See more words from the same year

Dictionary Entries Near Pythagorean theorem

Pythagorean semitone

Pythagorean theorem

Pythagoric

See More Nearby Entries 

Statistics for Pythagorean theorem

Cite this Entry

“Pythagorean theorem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Pythagorean%20theorem. Accessed 23 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!