Question

what kind of triangle is this? equilateral isosceles but not equilateral scalene

Explanation:

Step1: Recall triangle - type definitions

An equilateral triangle has all angles equal to 60°. An isosceles triangle has two equal angles. A scalene triangle has no equal angles.

Step2: Analyze given angles

The given angles of the triangle are 102°, 39°, and 39°. Since two angles (39° and 39°) are equal and it is not an equilateral triangle (as not all angles are 60°).

Answer:

isosceles but not equilateral