A triangle with all three sides of different lengths is known as a scalene triangle. Unlike isosceles triangles, which have two sides of equal length, or equilateral triangles, which have all sides equal, scalene triangles possess unique side lengths. This variation means that all three angles in a scalene triangle are also different. The properties of scalene triangles lead to diverse applications in geometry and trigonometry, as they can exhibit various characteristics, including acute, obtuse, or right angles, depending on the specific measurements of the sides.