Six.
Three lines joining pairs of opposite vertices and
three joining the midpoints of opposite sides.
A regular hexagon has six lines of symmetry.
A regular 6 sided hexagon has 6 lines of symmetry
if it's a regular hexagon it has 6 lines of symmetry
if it is a regular hexagon then it has 6 lines of symmetry
six
Six axis of symmetry * * * * * It need not have any.
3
Has 6 lines of symmetry
Since a hexagon is a horizontal plane figure it cannot have a horizontal plane of symmetry.
A regular hexagon has 6 but a hexagon can have 0, 1 or 2 axes of symmetry. It cannot have 5. Not sure about 3 or 4.
A regular hexagon has 2 lines of symmetry. 1 line verticle and 1 line horizontal.
For a regular hexagon I can find 6. For an irregular hexagon I can find fewer.