right triangle

noun

Definition of right triangle 

: a triangle having a right angle — see triangle illustration

Examples of right triangle in a Sentence

Recent Examples on the Web

His theorem, a part of Euclidean geometry taught in many high school math classes, states that the hypotenuse of a right triangle (the side opposite the right angle) equals the sum of the squares of the other two sides. Kevin Kelleher, Fortune, "Stonehenge Builders Used Pythagoras' Theorem Centuries Before His Birth, Say Experts," 21 June 2018 Remember the Pythagorean Theorem for solving right triangles, that x2 + y2 = z2? Andrew Moseman, Popular Mechanics, "Here's a Fun Math Goof in 'Star Trek: The Next Generation'," 1 Sep. 2017 Remember the Pythagorean Theorem for solving right triangles, that x2 y2 = z2? Andrew Moseman, Popular Mechanics, "Here's a Fun Math Goof in 'Star Trek: The Next Generation'," 1 Sep. 2017 This equation also represents a fundamental property of right triangles — that the square of the longest side, or hypotenuse, is the sum of the squares of the other two shorter sides. Kenneth Chang, New York Times, "Hints of Trigonometry on a 3,700-Year-Old Babylonian Tablet," 29 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'right triangle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of right triangle

1675, in the meaning defined above

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Time Traveler for right triangle

The first known use of right triangle was in 1675

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More Definitions for right triangle

right triangle

noun

English Language Learners Definition of right triangle

: a triangle that has a right angle

right triangle

noun

Kids Definition of right triangle

: a triangle having a right angle

More from Merriam-Webster on right triangle

Spanish Central: Translation of right triangle

Britannica.com: Encyclopedia article about right triangle

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