Hey there!! 
(1) Both the angles sum up to be 180. 
(2) Both the angles sum up to be 90
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(1) 4x+5+8x-5=180 
... 12x=180 
... x= 180/12 
... x = 15 
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(2) 4z+3z+6=90 
... 7z+6=90 
... 7z=84 
... z=84/7
... x=12 
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Hope it helps!
 
        
             
        
        
        
A. incenter
point w is shown in the triangle formed by 3 different lines. these lines are called angle bisectors, and the point at which the angle bisectors meet is called the incenter of a triangle
        
             
        
        
        
Answer:
angle 2 =90 because it is a right angle 
 
        
                    
             
        
        
        
X is less than or equal 18. I hope it helps