Question

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

Explanation:

Step1: Recall triangle side classifications

• Equilateral: All 3 sides equal (all angles \(60^\circ\)).
• Scalene: All 3 sides different (all angles different).
• Isosceles: At least 2 sides equal (at least 2 angles equal).

Step2: Analyze the given triangle

The triangle has two marked (equal) angles (red arcs). By the Isosceles Triangle Theorem, sides opposite equal angles are equal. So, two sides are equal. It is not equilateral (no indication all three angles/ sides equal). Thus, it is isosceles but not equilateral.

Answer:

isosceles but not equilateral