A triangle with all three sides of different lengths is called a scalene triangle. In scalene triangles, not only do the sides differ, but the angles are also all distinct. This characteristic sets it apart from other triangle types, such as isosceles (which has two equal sides) and equilateral (where all three sides are equal). The properties of a scalene triangle make it diverse in appearance and geometrical properties, often requiring specific methods for calculating area, perimeter, and other measurements. Scalene triangles are common in various geometric contexts and applications in mathematics and engineering.