right-angled triangle: meaning, definition, pronunciation and examples
Medium in academic contexts, low in everyday usage.Technical, academic.
Quick answer
What does “right-angled triangle” mean?
A triangle with one interior angle measuring exactly 90 degrees.
Audio
Pronunciation
Definition
Meaning and Definition
A triangle with one interior angle measuring exactly 90 degrees.
In geometry, a fundamental shape used in the Pythagorean theorem and trigonometry, often applied in calculations involving sides, angles, and real-world problems.
Dialectal Variation
British vs American Usage
Differences
In British English, 'right-angled triangle' is the standard term; in American English, 'right triangle' is more commonly used.
Connotations
Both are neutral technical terms with no significant connotations.
Frequency
'Right-angled triangle' is more frequent in British mathematical texts, while 'right triangle' dominates in American contexts.
Grammar
How to Use “right-angled triangle” in a Sentence
a right-angled triangle with [sides]in a right-angled triangle, [property]Vocabulary
Collocations
Examples
Examples of “right-angled triangle” in a Sentence
adjective
British English
- The shelf has a right-angled support.
- He marked a right-angled corner on the paper.
American English
- Use a right-angled bracket for the frame.
- The design includes right-angled edges.
Usage
Meaning in Context
Academic
Widely used in mathematics, physics, and engineering education and research.
Everyday
Rarely used outside educational or specific practical contexts like homework or DIY projects.
Technical
Essential in geometry, trigonometry, and applications such as architecture, construction, and engineering.
Vocabulary
Synonyms of “right-angled triangle”
Vocabulary
Antonyms of “right-angled triangle”
Watch out
Common Mistakes When Using “right-angled triangle”
- Omitting the '-ed' and saying 'right-angle triangle', or confusing it with other triangle types like isosceles or scalene.
FAQ
Frequently Asked Questions
A right-angled triangle is a triangle that has one interior angle measuring exactly 90 degrees, making it fundamental in geometry.
An acute triangle has all angles less than 90 degrees, while a right-angled triangle has one angle equal to 90 degrees.
The Pythagorean theorem states that in a right-angled triangle, the square of the hypotenuse equals the sum of the squares of the other two sides, enabling calculations of side lengths.
Yes, they are synonymous, with 'right-angled triangle' preferred in British English and 'right triangle' in American English.
A triangle with one interior angle measuring exactly 90 degrees.
Right-angled triangle is usually technical, academic. in register.
Right-angled triangle: in British English it is pronounced /ˌraɪt ˈæŋ.ɡəld ˈtraɪ.æŋ.ɡl̩/, and in American English it is pronounced /ˌraɪt ˈæŋ.ɡəld ˈtraɪ.æŋ.ɡəl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a right-angled triangle as having a 'right' angle, similar to the corner of a book or a square.
Conceptual Metaphor
Often represents stability and foundation due to its role in the Pythagorean theorem, symbolizing fundamental principles in mathematics.
Practice
Quiz
What is the most common American English term for 'right-angled triangle'?