Directions: Type your answer in the box. Quadrilateral $A B C D$ has a perimeter of $34 \mathrm{ft}$. If side $A D$ is $12 \mathrm{ft}$, how long is side $C D$ ?

Step 1 ：Given: Perimeter of Quadrilateral ABCD = 34 ft, AD = 12 ft

Step 2 ：We need to find the length of side CD.

Step 3 ：\(Perimeter = AB + BC + CD + AD\)

Step 4 ：\(34 = AB + BC + CD + 12\)

Step 5 ：\(22 = AB + BC + CD\)

Step 6 ：Insufficient information to determine the length of side CD.

Step 7 ：\(\boxed{Insufficient \ information}\)