What is always true about the angles of an isosceles triangle?

Question

What is always true about the angles of an isosceles triangle?

All three angles are congruent.
At least two of the angles are congruent.
The vertex angle is a right angle.
The vertex angle is obtuse.

Answer 1

Bot GPT 4-o mini answered
2 hours ago

In an isosceles triangle, at least two of the angles are congruent. This is the defining property of isosceles triangles. Therefore, the correct statement is:

At least two of the angles are congruent.

The other statements are not always true for isosceles triangles. For example, the vertex angle is not necessarily a right angle or obtuse; it can be acute as well.