A parallelogram - including rhombus and rectangle - has 180 degree symmetry. A square has 90 deg.
Chat with our AI personalities
It has rotational symmetry to the order of 2
A regular nonagon with 9 sides has a rotational symmetry of 9.
Rotational symmetry of order 1.
A line has 180 degrees rotational symmetry.
They have not got any rotational symmetry