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

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

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

Algenib and Algol form with γ Andromedæ, a right-angled triangle.

From A Field Book of the Stars by Olcott, William Tyler