Answer:
30
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the opposite interior angles
150 = ?+120
Subtract 120 from each side
150-120 = ?
30 = ?
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
Logₐa = 1
 
        
                    
             
        
        
        
Answer:
Surface Area = 283
Step-by-step explanation: 
Radius = 3
Height = 12
Formula for suface area is SA= 2πrh+2πr^2
let "r" be for radius
let "h" be for height 
SA=2*π*3*12+2*π*3^2
SA=282.74 
round to the nearest ones spot and that will make the surface area = 283