1, RT in the mathematical RT triangle represents a right angle. RT is the abbreviation of English Righttriangle, which is translated into Chinese as a right triangle.

2. A right triangle is a geometric figure. This is a triangle with right angles. There are two kinds of right-angled triangles: ordinary right-angled triangles and isosceles right-angled triangles. In a right triangle, two sides adjacent to a right angle are called right angles.