It has 8 rotational symmetry.
5
18
If it is a regular octagon then it has rotational symmetry to the order of 8
It has 8lines of rotational symmetry
Parallelograms: 2-fold Square: 4-fold n-fold symmetries refer to rotational symmetries. Consequently, any symmetries about axes that these and other quadrilaterals may have are not relevant to this question.
9 reflection
There are no right angles in an octagon.An 8 sided octagon normally has no right angles.
Infinitely many.
An ellipse has rotational symmetry of order 2.
2
yes, in fact it can have 6 rotational symmetries.
5
18
Two.
a heart have no rotational symmetry!
A regular hexagon has 6 rotational symmetries (rotational symmetry of order six) and 6 reflective symmetries (six lines of symmetry).
If it's a regular 8 sided octagon then it rotational symmetry to the order of 8