Question

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

Explanation:

Step1: Recall triangle side classification

Triangles are classified by sides: equilateral (all 3 sides equal), isosceles (at least 2 sides equal), scalene (all sides different). Equal sides correspond to equal angles (marked by arcs).

Step2: Analyze the given triangle

The triangle has two angles with the same arc marking (equal angles), so their opposite sides are equal. It's not equilateral (only two equal angles, not three). So it's isosceles (not equilateral).

Answer:

isosceles but not equilateral