I don't think it is. Microwave energy levels correspond to rotational modes, and for rotational spectroscopy, a molecule has to have a dipole moment... homonuclear diatomics like Br2 don't, and thus do not exhibit a pure rotational spectrum.
A "pure" trapezoid (a pair of parallel sides and two random sides) does not have rotational symmetry. If it is a parallelogram then it has a 180 degree symmetry. And if the paralloelogram happens to be a square, you have 90 deg symmetry.
a heart have no rotational symmetry!
A trapezium does not have rotational symmetry.
It has 8 rotational symmetry.
It has 8lines of rotational symmetry
It has rotational symmetry to the order of 2
Equilateral triangles have rotational symmetry.
No a Z doesn't have a rotational symmetry
A trapezoid has no rotational symmetry.
A kite does not have rotational symmetry.
A line has rotational symmetry of order 2.