Question

a triangle has angle measurements of 47°, 47°, and 86°. what kind of triangle is it? equilateral isosceles but not equilateral scalene

Explanation:

Step1: Recall triangle - type definitions

An equilateral triangle has all angles equal ($60^{\circ}$ each). An isosceles triangle has at least two equal angles. A scalene triangle has no equal angles.

Step2: Analyze given angles

The given angles are $47^{\circ},47^{\circ},$ and $86^{\circ}$. Since two angles ($47^{\circ}$ and $47^{\circ}$) are equal and not all angles are equal (not $60^{\circ}$ each).

Answer:

isosceles but not equilateral