orthogonaltriangle
nounUK /ɔːˈθɒɡənəl ˈtraɪæŋɡəl/
US /ɔːrˈθɑːɡənəl ˈtraɪæŋɡəl/
A triangle that has one square corner, like the corner of a book.
The carpenter drew an orthogonaltriangle to check that the shelf was straight.
RELATED WORDS
OTHER MEANINGS
2. A triangle in which two sides meet at exactly ninety degrees.
In an orthogonaltriangle, the longest side is always opposite the square corner.
3. A three-sided shape used in building and design to make sure corners are true.
The builder used an orthogonaltriangle to line up the wall.
4. A triangle whose sides satisfy the Pythagorean rule.
Students proved the orthogonaltriangle rule using squares on each side.