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right triangle

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noun
  1. a triangle having a right angle (contrasted with oblique triangle).
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Origin of right triangle

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for right triangle

right triangle

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

right triangle

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

right triangle

A triangle that contains a right angle.

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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.