right-angled triangle BrE
right triangle AmE

He listed the six distinct cases of a right-angled triangle in spherical trigonometry.

Each apparently forms a 13x5 right-angled triangle, but one has a 1x1 hole in it.

"I think it's barking up the wrong tree to try to figure out whether or not it was a right-angled triangle," he said.

When then one leg is advanced it becomes the hypotenuse of a right-angled triangle.

The shape of Manezhnaya Square is close to the right-angled triangle.

The table gave part of the answers for a whole series of right-angled triangles.

The standard trigonometric ratios can only be used on right-angled triangles.

Here we have two right-angled triangles with equal sides.

You would not write your name in pencil across the hypotenuse of a right-angled triangle.

The parish is shaped like a right-angled triangle whose longest side runs from north to south.