An acute angled triangle, right angled triangle or obtuse angled triangle.
A right-angled triangle.
It is the hypotenuse
Exactly as in the question it is a right angle triangle
It is called the hypotenuse. The adjacent side is beneath it and the opposite side opposite it.
A right angled triangle.
A scalene triangle that is not right angled.
They are:equilateralacute angled isoscelesacute angle scaleneright angled isoscelesright angle scaleneobtuse angled isoscelesobtuse angle scalene.