Answer :
we know that
The perimeter of trapezoid KLMN is equal to
P=KL+LM+MN+NK
Remember that
KL=NK ------> by isosceles trapezoid
substitute the given values
[tex]\begin{gathered} P=(2\sqrt[]{2})\text{+(}\sqrt[]{5})\text{ +(}\sqrt[]{2})\text{ +2}\sqrt[]{2} \\ P=(5\sqrt[]{2})\text{+(}\sqrt[]{5})\text{ units} \end{gathered}[/tex]