A=Lw
The area is 12*34, 408 sq ft.
        
                    
             
        
        
        
(3x19.95+23.5+124.95)1.05=
59.85+23.5+124.95 =208.3
208.3×1.05=218.715
        
             
        
        
        
Answer:
(a)The missing measurements are 9 feet and  .
.
(b)Therefore, the length of the fence is  
Step-by-step explanation:
The diagram of the yard is attached below.
(a)I have labeled the missing dimensions of the yard as x and y.
Therefore:

Similarly:

The missing measurements are 9 feet and  .
.
(b)Length of the Fence
The fence is rectangular shaped with:
Length = 
Width = 
Perimeter of a Rectangle = 2(L+W)
Therefore, the length of the fence
 