### Definition of Right-angled triangle

1. Noun. A triangle with one right angle.

Exact synonyms: Right Triangle
Generic synonyms: Triangle, Trigon, Trilateral
Terms within: Hypotenuse
Antonyms: Oblique Triangle

### Definition of Right-angled triangle

1. Noun. (geometry) Same as right triangle. ¹

¹ Source: wiktionary.com

### Right-angled Triangle Pictures

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### Literary usage of Right-angled triangle

Below you will find example usage of this term as found in modern and/or classical literature:

1. The American Arithmetic: Adapted to the Currency of the United States. To by Oliver Welch (1826)
"To measure the surface of a right angled triangle. , DEFINITION.—A right angled triangle is formed by a right line falling perpendicularly on another line, ..."

2. An Introduction to Mensuration and Practical Geometry by John Bonnycastle, James Ryan (1848)
"Required the area of.a right angled triangle, whose hypothenuse is 50, ... Any two sides of a right angled triangle being given to find the third inde. ..."

3. The University Arithmetic: Embracing the Science of Numbers, and Their by Charles Davies (1852)
"RIGHT ANGLED TRIANGLE. 349. The properties of the right angled are so important ... In every right angled triangle, the square described on the hypothenuse, ..."

4. The University Arithmetic: Embracing the Science of Numbers, and Their by Charles Davies (1853)
"In every right angled triangle, the square described on the hypothenuse, is equal to the sum ... Thus, if ABC be a right angled triangle, right angled at C, ..."

5. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"It is probable too lhat this theorem was known to them in the simple case where the right-angled triangle is isosceles, inasmuch as it would be at once ..."

6. Hermathena by Trinity College (Dublin, Ireland) (1879)
"Assuming, then, that this theorem was known to Thales, he must have known that the sum of the three angles of any right-angled triangle is equal to two ..."

7. The British Quarterly Review by Robert Vaughan, Henry Allon (1869)
"... whose chord forms the base of a right- angled triangle and the extended perpendicular to it which unites the right ..."