right-angled triangle

British  

noun

1. US and Canadian name: right triangle.  a triangle one angle of which is a right angle

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Example Sentences

You may be familiar with Pythagoras from his Pythagorean theorem, a key principle in geometry establishing a relationship between the sides of a right-angled triangle.

From Textbooks • Jun. 15, 2022

Keith Davis wrote a widely-used management textbook in 1957 that illustrated the theory in the form of a series of steps in a right-angled triangle leading to a peak.

From Scientific American • Apr. 27, 2019

It is a variation of the basic principle that if you know one angle and one side of an equilateral or right-angled triangle, then you can determine the other angles and sides.

From "The Invention of Science" by David Wootton

Pythagoras had learned the triangle theorem—that the length of the third side of a right-angled triangle can be deduced mathematically from the length of the other two sides—from Indian or Babylonian geometers.

From "The Gene" by Siddhartha Mukherjee

Salisbury prison, then commonly called "Salisbury penitentiary," was in the general form of a right-angled triangle with base of thirty or forty rods, perpendicular eighty or ninety.

From Lights and Shadows in Confederate Prisons A Personal Experience, 1864-5 by Sprague, Homer B. (Homer Baxter)