The side of Figure T' that is congruent to side 1 of Figure S using relevant transformations is; KL.
When rotating a shape 90° clockwise, it is expressed as;(x, y) → (y, -x).
When reflecting the image over the y-axis, it is expressed as (x, y) → (-x, y).
Carrying out the two transformations would mean that we are reflecting a shape over the y = -x line, where;
(x, y) → (-y, -x).
Thus, the side of Figure T' that is congruent to side 1 of Figure S is KL.
Read more about Rotational Transformation at; https://brainly.com/question/27224272
#SPJ2