Definition of right triangle in English:

right triangle

Syllabification: right tri·an·gle

noun

North American
A triangle with a right angle.
More example sentences
  • To fit the National Gallery's East Building on a trapezoid-shaped site, architect I.M. Pei based his design on a division of a trapezoid into an isosceles triangle and a smaller right triangle.
  • The base of the wedge is an isosceles right triangle in a vertical plane.
  • Indeed, if there is one thing that someone might remember from grade school mathematics, it's the fact that ‘the square of the hypotenuse of a right triangle is equal to the sum of the squares of the two adjacent sides.’

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