Question

classify this triangle by its sides.
isosceles but not equilateral
equilateral
scalene

Explanation:

Step1: Recall triangle side classifications

A scalene triangle has all sides of different lengths (and all angles different). An isosceles triangle has at least two equal sides (and at least two equal angles). An equilateral triangle has all three sides equal (and all angles \(60^\circ\)).

Step2: Analyze the given triangle

The triangle has three different angle marks (each angle is marked differently, implying different angle measures). In a triangle, equal angles are opposite equal sides. Since all angles are different, all sides must be different in length.

Step3: Match to the classification

A triangle with all sides of different lengths is a scalene triangle. The other options: "isosceles but not equilateral" requires at least two equal sides (which we don't have here), and "equilateral" requires all sides equal (which is not the case here).

Answer:

scalene