Question

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

Explanation:

Step1: Recall side - length definitions

Equilateral triangle has 3 equal sides. Scalene has 3 unequal sides. Isosceles has 2 equal sides.

Step2: Analyze the triangle

The triangle has 2 equal sides (marked by congruence symbols).

Answer:

isosceles but not equilateral