we are given that 
angle(ACF)=90
angle(ACB)=61
sum of all angles along any line is 180
so, we get 
angle(ACF)+angle(ACD)=180
we can plug value 
90+angle(ACD)=180
angle(ACD)=90
now, we can use formula 
angle(ACD)=angle(ACB)+angle(BCD)
now, we can plug values
and we get 
90=61+angle(BCD)
90-61=61-61+angle(BCD)
angle(BCD)=29................Answer
 
        
                    
             
        
        
        
Answer:
you need to 12 minus 5b9 as base and don’t forget to mention the integer
 
        
             
        
        
        
To make something smaller and easier
        
                    
             
        
        
        
Answer:
21,40,42
Step-by-step explanation:
That's it.Wish it's correct.:D