Is that a trick question wouldn't it be 20??? I'm confused
        
             
        
        
        
Answer:
all three angles should add up to 180 so subtract what you know from 180 and you should be able to find everything from there
 
        
             
        
        
        
The 3 inside angles of a triangle need to equal 180 degrees.
You are given 28 for one.
 The second on is adding 58 + 77 = 135 degrees.
X = 180 - 28 - 135 = 17 degrees
 
        
             
        
        
        
Answer:
He could make 16 piles.
Step-by-step explanation:
Divide 48 by 3: 48 ÷ 3 = 16
 
        
             
        
        
        
Answer:
15
Step-by-step explanation:
By the diagram, you can see the sum of segment AB and segment BC is segment AC. Adding the given expressions for AB and B is  . Simplifying the equation
. Simplifying the equation  , gives
, gives  . Substituting
. Substituting  in the equation for segment AC gives 15.
 in the equation for segment AC gives 15.