Answer:
i do think it's D or C 
Step-by-step explanation:
D or C 
 
        
             
        
        
        
Answer:
A i think
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
Since , internal sum of angle of triangle is 180°
So,
66 + x +49 + x+83 = 180
or, 198 + 2x = 180
or, 2x = 180 -198
or, 2x = -18
hence, x = - 9
Now angle A = x + 49
 = (-9) + 49
 = 40
<u>Hence </u><u>measure</u><u> </u><u>of </u><u>angle </u><u>A </u><u>is </u><u>4</u><u>0</u><u>°</u><u>.</u>
 
        
                    
             
        
        
        
The density of aluminum is known to be 2.70 g/cm3