A rotation turns a shape through an angle at a fixed point as for example if you turn around backwards that will be a rotation of 180 degrees.
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The answer depends on the centre of rotation. A rotation cannot be described without specifying the centre of rotation.
Size remains constant in reflection and rotation.
rotation symmetry of a parallelogram Sequence
It is called a rotation.
Sometimes called rotation symmetry, or symmetry of rotation. If you have an object that can be turned through a certain angle (like rotating a cube through 90o) and then it looks identical, then that object has a certain symmetry under rotation. If you can turn it through any angle, like a cylinder, then it has rotation (or rotational) symmetry.