The perimeter of ABCD is 104 units
How to find the perimeter
Perimeter is solved by adding the sides. It is important to know that reflection preserves the dimension of the object. Hence the size remains congruent before and after reflection.
That is to say
AB = A'B'
BC = B"C'
CD = C'D'
DA = D'A'
Perimeter = 22 + 20 + 30 + 32
Perimeter = 104 units