Question

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

Explanation:

Step1: Recall triangle side - based definitions

An equilateral triangle has all three sides equal. An isosceles triangle has at least two sides equal. A scalene triangle has all three sides of different lengths.

Step2: Analyze the given triangle

In the given triangle, only two sides are marked as equal (by the tick - marks). Since it does not have all three sides equal, it is not equilateral. But it has two sides equal, so it is isosceles.

Answer:

isosceles but not equilateral