What is another word for right triangle?
Pronunciation: [ɹˈa͡ɪt tɹˈa͡ɪaŋɡə͡l] (IPA) 
A right triangle is a three-sided polygon that has one 90-degree angle. Other synonyms for right triangle include a rectangular triangle, a pythagorean triangle or a orthogonal triangle. The term "rectangular triangle" references the fact that the right angle of a right triangle is often also referred to as a square angle. The name "Pythagorean triangle" comes from Pythagoras's famous theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. Finally, the term "orthogonal triangle" is used in the study of geometry to indicate that the lines of the triangle are at right angles.
