trigonometry

noun

trig·​o·​nom·​e·​try ˌtri-gə-ˈnä-mə-trē How to pronounce trigonometry (audio)
: the study of the properties of triangles and trigonometric functions and of their applications

Examples of trigonometry in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Although the Pythagorean theorem has been proved with algebra and geometry, mathematicians previously thought that it couldn’t be proved using trigonometry. Alexa Robles-Gil, Smithsonian Magazine, 30 Oct. 2024 Related article Turbulent skies of Vincent Van Gogh’s ‘The Starry Night’ align with a scientific theory, study finds Jackson and Johnson’s study outlines five new ways of proving the theorem using trigonometry, and their method reveals five more proofs for 10 total. Katie Hunt, CNN, 29 Oct. 2024 Ex-student Charles is a trigonometry wiz, but all the logic in the world can’t prevent his longing for death. Armond White, National Review, 25 Sep. 2024 In writing courses, for example, students learn how to spot fallacies, and elementary proofs are covered in trigonometry. Vinay K. Chaudhri, Scientific American, 5 Sep. 2024 See all Example Sentences for trigonometry 

Word History

Etymology

New Latin trigonometria, from Greek trigōnon + -metria -metry

First Known Use

1614, in the meaning defined above

Time Traveler
The first known use of trigonometry was in 1614

Dictionary Entries Near trigonometry

Cite this Entry

“Trigonometry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trigonometry. Accessed 26 Nov. 2024.

Kids Definition

trigonometry

noun
trig·​o·​nom·​e·​try ˌtrig-ə-ˈnäm-ə-trē How to pronounce trigonometry (audio)
: a branch of mathematics concerned with the study of the properties of triangles and trigonometric functions and of their practical uses
Etymology

from scientific Latin trigonometria, literally "triangle measurement," derived from Greek tri- "three" and Greek gonia "angle" and Greek -metria "art or science of measuring"

More from Merriam-Webster on trigonometry

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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