A scalene triangle is a type of triangle where all three sides have different lengths. This means that no two sides are equal, and as a result, all three angles are also different. Scalene triangles can vary in shape, appearing either tall and narrow or short and wide, depending on the lengths of the sides. In contrast to other triangles, such as isosceles triangles (which have at least two equal sides) and equilateral triangles (where all sides are equal), scalene triangles are unique in their asymmetry. They are commonly found in various geometric applications and can be used in real-world contexts, such as architecture and design.