The perimeter of RSTU will be C.22m if you look at both of them u will see they are both the same and tell you how long the sides are,........hope i was right:))
If the quadrilateral are congruent that means that their corresponding sizes are congruent AB=RS = 4m BC=ST=5m CD=TU= 5m DA=UR=8m So perimeters of them are equal and perimeter of RSTU =4+5+5+8=22m
