Question

which type of triangle will always have at least 1 - fold reflectional symmetry?
right triangle
obtuse triangle
acute triangle
isosceles triangle

Explanation:

An isosceles triangle has at least one line of symmetry (a line along which it can be folded such that the two halves match exactly), giving it 1 - fold reflectional symmetry. Right, obtuse, and acute triangles do not always have reflectional symmetry.

Answer:

isosceles triangle