Final answer:
The angle of rotation after a reflection in two parallel mirrors would normally be 180 degrees per reflection. However, the given options do not seem to match this context, and there may be an error in the question since parallel lines do not intersect to form an angle.
Step-by-step explanation:
The question asks to find the angle of rotation for a figure reflected in two parallel lines where the angle between them is 72 degrees. When a figure is reflected across two parallel mirrors or lines, the angle of rotation is twice the angle between the object and the mirror line. However, since the lines are parallel in this case, and intersecting to form a 72-degree angle does not seem to make sense as parallel lines do not intersect, let's consider the typical behavior of light in a system of parallel mirrors. Usually, reflections in parallel mirrors result in images that have a 180-degree rotation between successive images. Since the question seems to be leading to the concept of rotational symmetry as well, we can discuss it in those terms. Nevertheless, the answer choices provided do not include 180 degrees, and without additional context, we can default to considering each reflection across a line as a 180-degree rotation. In these terms, the final orientation of the figure after two reflections (360 degrees in total) would visually appear identical to the original orientation, which misleadingly could suggest no rotation has occurred.