Answer:
x =2
Perimeter = 54
Step-by-step explanation:
You can cut the polygon into different shapes. The one with a missing side is a rectangle. Cutting it results in sides 3, 8, 6 + ?, and 3. All opposite sides are equal. x =2. The perimeter, you add the sides. 3 + 6 + 3 + 2 + 6 +4 + 15 +4 +3 + 8 = 9 + 5 + 10 + 19 + 11 = 14 + 29 + 11 = 14 + 40 = 54
