The side that is equivalent to side SR is side AB.
<h3>How to carry out Rotational Transformation?</h3>
When rotating a point 180 degrees counterclockwise about the origin, our point A(x, y) becomes A'(-x, -y). Thus, all we do is make both x and y negative.
The coordinates of the original square are;
P(2, 4); Q(5, 5); R(5, 1); S(2, 1)
Now, applying the transformation rule above gives us;
P(-2, -4); Q(-5, -5); R(-5, -1); S(-2, -1)
The side that is therefore equivalent to side SR is side AB.
Read more about Rotational Transformation at; brainly.com/question/26249005
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