State whether the following rectangles are similar or not.

Two polygons of the same number of sides are similar, if

a) All the corresponding angles are equal.

b) all the corresponding sides are in the same ratio (or proportion)

In case of rectangles ABCD and PQRS

And it is given that both are rectangles and we know that, in rectangle all angles are of 90°

The corresponding sides of a rectangle ABCD and PQRS are proportional, and their corresponding angles are equal. Hence, rectangles ABCD and PQRS are similar.