Dictionary.com

right triangle

noun

a triangle having a right angle (contrasted with oblique triangle).

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You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Origin of right triangle

First recorded in 1920–25

Words nearby right triangle

right-to-left shunt, right-to-life, right-to-work, right-to-work law, right-to-work laws, right triangle, right up one's alley, right ventricle, right ventricular failure, right ventricular opening, rightward
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for right triangle

right triangle

noun

US and Canadian a triangle one angle of which is a right angleAlso called (in Britain and certain other countries): right-angled triangle
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 right triangle

right triangle

A triangle having a right angle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for right triangle

right triangle

A triangle that contains a right angle.

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.