There is an internal corner 90° corner size (edged) The side opposite the angle of the scene called the hypotenuse is the longest side in a triangle. The other two sides are called cathetus.
There is one internal angle measures 90 ° (angle) side opposite the right angle is called. Hypotenuse Which is the longest side of the triangle. Two sides called Perpendicular
Angles are one size 90 ° (right) side opposite the right angle is called on the opposite corner angle, which is the longest side of the triangle. The other two sides as war reparations.