# right triangle

noun
1.
a triangle having a right angle (contrasted with oblique triangle).
Origin of right triangle
1920-1925
1920-25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for right triangle
Historical Examples
• The area of a right triangle is 150 square feet, and its hypotenuse is 25 feet.

Romeyn Henry Rivenburg
• Think how you can get a right triangle from a right tri-prism.

Hugo B. Froehlich
• Man's successful responses to novel data—as when he argues that the diagonal on a right triangle of 796.278 mm.

Edward L. Thorndike
• In place of "right-angled triangle" modern writers speak of "right triangle," and so for the obtuse and acute triangles.

David Eugene Smith
• One of the drawings on this page is called a right triangle.

Hugo B. Froehlich
• We may put the word defined at the end, thus: "A triangle that has one of its angles a right angle is called a right triangle."

David Eugene Smith
• For example, suppose we say that "a triangle that has one of its angles a right angle is a right triangle."

David Eugene Smith
• The square on the hypotenuse of a right triangle is equivalent to the sum of the squares on the other two sides.

David Eugene Smith
• If a right triangle equicrurall to a triangle be greater in base, it is greater in angle: And contrariwise.

Peter Ramus
• When she comes to the solution of the right triangle, the baseball diamond does not come to her mind.

Francis B. Pearson
British Dictionary definitions for right triangle

## right triangle

noun
1.
(US & Canadian) a triangle one angle of which is a right angle Also called (in Britain and certain other countries) right-angled triangle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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right triangle in Science
 right triangle   A triangle having a right angle.
The American Heritage® Science Dictionary
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right triangle in Culture

### right triangle definition

A triangle that contains a right angle.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
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### Difficulty index for right triangle

Few English speakers likely know this word

### Word Value for right

9
9
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