<span>1.	m∠1 + m∠5 = 180° and m∠1 + m∠4=180°	
Given
2.	m∠1 + m∠5 = m∠1 + m∠4	
Substitution	
3.	m∠5 = m∠4	
</span>Subtraction property of equality 
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4.	Ray YZ is parallel to Ray UV	
</span>If alternate interior angles equal, then lines are ||. <span>
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Answer:
so true.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
16+x
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Step-by-step explanation:
960 75%
 
        
             
        
        
        
9514 1404 393
Answer:
   (-3, 3)
Step-by-step explanation:
The midpoint of a line segment is the average of the end point coordinates:
   ((1, 1) +(-7, 5))/2 = (1 -7, 1 +5)/2 = (-6, 6)/2 = (-3, 3) . . . midpoint coordinates