You can find the slope using the following formula:
 
 
        
             
        
        
        
I think it is b but wait till someone else answers to
        
             
        
        
        
Answer:
The degree of is 4.
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To find the perimeter, add all sides on the border of the shape.
In this case, don’t worry about the 15 feet inside.
This will be 11 + 16 + 16 + 6 = 49 ft.
Please give brainliest if you can! 
Hope this helps! :)
        
             
        
        
        
The perimeter of the rectangle is 16