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.

In an isosceles triangle, at least two of the angles are congruent. This unique property stems from the equal lengths of two sides, which creates two equal angles opposite those sides. It’s a delightful quality that helps us easily identify isosceles triangles while working on geometric problems! Remember, while the vertex angle can be right or obtuse, it doesn’t always have to be. The presence of two equal angles means the third angle adjusts accordingly to maintain the triangle's total angle sum of 180 degrees. So, whether you're sketching or calculating, you’ll always find a twist of harmony among those angles!