1. The problem asks to classify a triangle by its sides. 2. Triangles can be classified into three types based on their side lengths: - Equilateral: all three sides are equal. - Isosceles (but not equilateral): exactly two sides are equal. - Scalene: all three sides are different. 3. Since the triangle in the image has three unequal sides, it fits the definition of a scalene triangle. 4. Therefore, the triangle is classified as scalene.