Question

A triangle has angle measurements of 91°, 32°, and 57°. What kind of triangle is it?

equilateral
isosceles but not equilateral
scalene

Answer 1

Equilateral triangles are generally equiangular, so the triangle is not equilateral.

Isosceles triangles have at least two congruent angles, so the triangle is not isosceles.

The triangles must be scalene. Answer: Scalene.