State the smallest angle through which a regular pentagon may be rotated for rotational symmetry. Mention the rotational order for it.

Draw the lines of symmetry. Mark and name the centre of symmetry as $O$, for the rectangle with semi circle at two opp. ends.

Draw the lines of symmetry. Mark and name the centre of symmetry as $O$, for the $8$-sided figure with all equal sides.

Draw the lines of symmetry. Mark and name the centre of symmetry as $O$, for the oval with two equal arcs.

Draw the lines of symmetry. Mark and name the centre of symmetry as $O$, for the $3$ equal circles touching each other.

Draw the lines of symmetry. Mark and name the centre of symmetry as $O$, for $4$ equal circles touching $2$ circles each.