Fill in the blanks to make the statements true.

Order of rotational symmetry of a circle is __________.

Fill in the blanks to make the statements true.

Each of the letters H, N, S and Z has a rotational symmetry of order _________.

Order of rotational symmetry of a rectangle is __________.

Each face of a cuboid is a __________.

Fill in the blanks to make the statements true.

Line of symmetry for an angle is its __________.