What do you call a triangle with all sides of different lengths?

A triangle with all sides of different lengths is referred to as a scalene triangle. This classification is based on the unique property that each side has a distinct length, which also implies that all three angles are different. This differentiates scalene triangles from isosceles triangles, which have at least two sides of equal length, and equilateral triangles, where all three sides are equal. The term "right triangle" specifically refers to a triangle that contains a right angle but does not denote the lengths of its sides. Thus, the characteristics of a scalene triangle are specifically aligned with the definition provided in the question.