Order 5.
The shape will fit over itself exactly 5 times during a complete rotation.
They have not got any rotational symmetry
A regular nonagon with 9 sides has a rotational symmetry of 9.
Six.
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A regular hexagon has 6 rotational symmetries (rotational symmetry of order six) and 6 reflective symmetries (six lines of symmetry).
It has both because it has 5 lines of symmetry and rotational symmetry to the order of 5
If it is a regular 5 sided pentagon then its order of rotational symmetry is 5
A regular pentagon or a 5-pointed star have rotational symmetry of order 5.
5, you may think 1 but its actually 5
They have not got any rotational symmetry
it is order 5
A regular nonagon with 9 sides has a rotational symmetry of 9.
If it is a regular octagon then it has rotational symmetry to the order of 8
A line segment would have rotational symmetry.
If it is a regular octagon then it has rotational symmetry to the order of 8
If it's a regular 8 sided octagon then it rotational symmetry to the order of 8
Six.