Question

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

Explanation:

Step1: Recall triangle - type 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 side - lengths

The given triangle has side - lengths 18, 18, and 18. Since all three sides are equal, it meets the definition of an equilateral triangle.

Answer:

equilateral