Question

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

Explanation:

Step1: Recall triangle side - based definitions

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

Step2: Analyze the given triangle

The markings on the sides of the triangle show that all three sides are equal (the tick - marks on each side indicate congruence).

Answer:

equilateral