There are no right angles in an octagon.
An 8 sided octagon normally has no right angles.
It has 8 rotational symmetry.
9 reflection
5
18
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
Infinitely many.
An ellipse has rotational symmetry of order 2.
2
Two.
A seven-pointed star has seven rotational symmetries. This means it can be rotated in increments of ( \frac{360^\circ}{7} ) and still appear unchanged. Each of these rotations corresponds to one of the seven points of the star. Therefore, the total number of rotational symmetries is equal to the number of points.
8