6.
[tex]\begin{gathered} k\cdot DC=ZY \\ \end{gathered}[/tex]where:
k = Constant of proportionality:
so:
[tex]\begin{gathered} k\cdot32=8 \\ so\colon \\ k=\frac{8}{32} \\ k=\frac{1}{4} \end{gathered}[/tex]Therefore:
[tex]\begin{gathered} k\cdot BC=3.5 \\ so\colon \\ BC=4\cdot3.5 \\ BC=14 \end{gathered}[/tex]Therefore:
Let:
P1 = Perimeter of ABCD
P2 = Perimeter of WXYZ
[tex]\begin{gathered} \frac{1}{4}P1=P2 \\ so\colon \\ \frac{P1}{P2}=4 \end{gathered}[/tex]