1. The problem asks to classify a triangle by its sides. 2. Triangles can be classified as: - Equilateral: all three sides are equal. - Isosceles: exactly two sides are equal. - Scalene: all sides are different. 3. The given triangle has two sides marked with hash marks indicating they are equal. 4. Since exactly two sides are equal, the triangle is an isosceles triangle. 5. It is not equilateral because not all three sides are equal. Final answer: The triangle is isosceles but not equilateral.