x=6 cm
Step-by-step explanation:
As given in the question that ABCD is congruent to EFGH.
We can say that,
AD <-----> EH {Corresponding Parts Of Congruent Polygons}
AD=EH
We are given that,
the answer is (4,3)
since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.