# congruent

[ kong-groo-uhnt, kuhn-groo-, kuhng- ]

/ ˈkɒŋ gru ənt, kənˈgru-, kəŋ- /

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adjective

agreeing; accordant; congruous: His testimony was perfectly congruent with the content retrieved from the suspect’s phone.

Mathematics. of or relating to two numbers related by a congruence.

Geometry. (of figures) coinciding at all points when superimposed: congruent triangles.

Chemistry. (of a substance or compound) not undergoing a change in composition when undergoing a reaction, as with congruent melting.

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## Origin of congruent

First recorded in 1425–75; late Middle English, from Latin congruent- (stem of congruēns, present participle of congruere “to come together, fit in, agree”), equivalent to con- prefix meaning “together” + -gru- base of uncertain meaning (attested only in this verb and ingruere “to fall upon”) + -ent- participle ending; see con-, -ent

## OTHER WORDS FROM congruent

con·gru·ent·ly, adverbnon·con·gru·ent, adjectivenon·con·gru·ent·ly, adverb## WORDS THAT MAY BE CONFUSED WITH congruent

congruous, congruentDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use congruent in a sentence

Their result marks the first time anyone has found an example of a tetrahedron that is scissors congruent to a cube but doesn’t tile space.

Undergraduates Hunt for Special Tetrahedra That Fit Together|Kevin Hartnett|February 9, 2021|Quanta MagazineThis was soon shown not to be true, but it turns out that all rational tetrahedra are congruent to the cube.

Tetrahedron Solutions Finally Proved Decades After Computer Search|Kevin Hartnett|February 2, 2021|Quanta Magazine

## British Dictionary definitions for congruent

congruent

/ (ˈkɒŋɡrʊənt) /

adjective

agreeing; corresponding; congruous

having identical shapes so that all parts correspondcongruent triangles Compare similar (def. 2)

of or concerning two integers related by a congruence

## Derived forms of congruent

congruently, adverb## Word Origin for congruent

C15: from Latin congruere to meet together, agree

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for congruent

congruent

[ kŏng′grōō-ənt, kən-grōō′ənt ]

Relating to geometric figures that have the same size and shape. Two triangles are congruent, for example, if their sides are of the same length and their internal angles are of the same measure.

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.