right-angled triangle

noun

1. a triangle one angle of which is a right angle US and Canadian nameright triangle

Example Sentences

It is a variation of the basic principle that if you know one angle and one side of an equilateral or right-angled triangle, then you can determine the other angles and sides.

From Literature

Pythagoras had learned the triangle theorem—that the length of the third side of a right-angled triangle can be deduced mathematically from the length of the other two sides—from Indian or Babylonian geometers.

From Literature

They fold the crisp sheet to an oblong, and the oblong to a square, and the square to a right-angled triangle.

From Salon

Further, of trilateral figures, a right-angled triangle is that which has a right angle, an obtuse-angled triangle that which has an obtuse angle, and an acute-angled triangle that which has its three angles acute.

From Project Gutenberg

An important application of these theorems is at once made to a right-angled triangle, viz.:—

From Project Gutenberg