This article will go through right angled triangles, types of right angled triangles, right angled triangle properties, right angled triangle area, perimeter formula, and other topics. The symbol for a right angle triangle is -the small square in the corner indicates that it is a right angled triangle. In mathematics, we examine numerous types of triangles such as equilateral, isosceles, scalene, and right-angled triangles. A right angled triangle is a triangle that contains a right angle (90°). Right Angle Triangle: One of the most useful forms in Geometry is the right angled triangle. Things to Remember about right triangle.Right Angle Triangle Definition & Meaning.NCERT Solutions Class 10 Social Science.NCERT Solutions For Statistics Class 11.