Answer:
I would say 120 but that could be also be wrong but ill go with 120
 
        
             
        
        
        
Answer:
I believe its 57. 
Step-by-step explanation:
180-66=57.
57+57+66=180
 
        
             
        
        
        
You can round 396 to 400 and 71 to 70. then you just multiply them and get 28,000. :))
        
             
        
        
        
Answer:
IJ is going to be 5400.
Step-by-step explanation:
60*90= 5400.
90 is the right angle on J.
I is 60 degrees.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
