A right triangle with the two legs (and their corresponding angles) equal. An isosceles right triangle therefore has angles of , , and . For an isosceles right triangle with side lengths , the hypotenuse has length , and the area is . The hypotenuse length for is called Pythagoras's constant.

The inradius and circumradius are

			(1)
			(2)

Polyforms made up of isosceles right triangles are called polyaboloes.

CITE THIS AS:

Weisstein, Eric W. "Isosceles Right Triangle." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/IsoscelesRightTriangle.html