right triangle

noun

1. a triangle having a right angle ( oblique triangle ).

right triangle

noun

1. a triangle one angle of which is a right angle Also called (in Britain and certain other countries)right-angled triangle

right triangle

1. A triangle having a right angle.

right triangle

1. A triangle that contains a right angle .

Word History and Origins

Origin of right triangle¹

First recorded in 1920–25

Example Sentences

I’m sure you’ve driven across or seen large steel truss bridges that are made by combining any number of huge steel beams into right triangles that interconnect.

From Seattle Times

The Pythagorean theorem provides an equation to calculate the longer side of a right triangle by summing the squares of the other two sides.

From Scientific American

You may also remember the simple equation, discovered by Pythagoras thousands of years ago, that describes a right triangle: A squared + B squared = C squared.

From Seattle Times

The Kresling pattern looks like a series of stacked right triangles wrapping around the robot’s belly, making it resemble a ridged and slightly squashed cylinder.

From Scientific American

The bedroom is shaped like a pentagon and the sitting room with built-in shelving is the shape of a right triangle.

From Washington Post