It has rotational symmetry to the order of 2
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The rectangle's rotational symmetry is of order 2. A square's rotational symmetry is of order 4; the triangle has a symmetry of order 3. Rotational symmetry is the number of times a figure can be rotated and still look the same as the original figure.
A rectangle
A rectangle is a possible candidate, as is an ellipse.
A parallelogram - including rhombus and rectangle - has 180 degree symmetry. A square has 90 deg.
Four - Two reflective, and two rotational about the diagonals.