Question

how can a regular hexagon be folded to show that it has reflectional symmetry?
fold the hexagon along a line from a vertex to the midpoint of an opposite side.
fold the hexagon along a line connecting the two midpoints of adjacent sides.
fold the hexagon along a line that bisects two vertex angles.
fold the hexagon along a line that creates a right angle at a vertex.

Explanation:

A regular hexagon has multiple lines of reflectional symmetry. Folding it along a line from a vertex to the mid - point of an opposite side, or along a line that bisects two vertex angles will result in the two halves of the hexagon matching exactly, showing reflectional symmetry. Folding along a line connecting mid - points of adjacent sides or a line that creates a right angle at a vertex will not show reflectional symmetry for the whole hexagon.

Answer:

Fold the hexagon along a line from a vertex to the midpoint of an opposite side.
Fold the hexagon along a line that bisects two vertex angles.