righttriangle
nounUK /ˈraɪt ˈtraɪæŋɡəl/
US /ˈraɪt ˈtraɪæŋɡəl/
A right triangle is a triangle with one square corner.
The carpenter used a right triangle to check that the shelf was straight.
RELATED WORDS
OTHER MEANINGS
2. A triangle in which one interior angle measures exactly 90 degrees.
In a right triangle, the side opposite the right angle is the longest side.
3. A geometric figure used in trigonometry to define sine, cosine, and tangent.
Students learned to find the missing side of a right triangle using trigonometry.
4. A shape often used in construction and drafting to mark square corners.
He placed the right triangle against the edge to draw a perfect corner.