I attached the missing head of the question.
Answer:
KL = 9 units
Step-by-step explanation:
We are given that DKLM is a rhombus.
A rhombus is a quadrilateral in which:
1- all sides are equal
2- diagonals are perpendicular to each other
3- each two opposite angles are equal
Since that given quadrilateral is a rhombus, this means that it has four equal sides which means that:
DK = KL = LM = MD
Since DK = 9 units
Therefore, all other three sides are also 9 units
Hope this helps :)