Answer:
Two angles are supplementary if the sum of their measures is 180 . ... You can write "the measure of angle 1" as m∠1. ... Find m∠2, m∠3, and m∠4.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
28
Step-by-step explanation:
Cross multiply
18k = 12 x 42
18 k = 504
    k = 504/18
    k = 28
 
        
                    
             
        
        
        
Answer:
b =  c − 2a 
      ------------
           2
Step-by-step explanation:
2a + 2b = c
2b = c − 2a
 b =  c − 2a 
      ------------
           2
 
        
             
        
        
        
Answer:
105 degrees
Step-by-step explanation:
You need to understand the properties of corresponding angles and supplementary angles.
 
        
             
        
        
        
Answer:
The  answer is A B E
Step-by-step explanation: