Answer:
230 - 151 + 180 + (43 - 12) = 290
Step-by-step explanation:
Use PEMDAS.
Evaluate the expression in the parentheses:
230 - 151 + 180 + (43 - 12)
43 - 12 = 31 
230 - 151 + 180 + 31
Add and Subtract From Left to Right:
230 - 151 + 180 + 31
79 + 180 + 31 
259 + 31
290 
<em>None of the given options are correct. </em>
 
        
             
        
        
        
No. Just because the angles are all less than 90 degrees, that doesn't tell us anything about the sides. The sides are all congruent ONLY if all 3 angles are 60 degrees each. If the angles all have different sizes, then so do the sides.
        
             
        
        
        
I don't really get your question. But, I will try my best to answer it. 42 is a whole number and you could use the number for any operation.
I hope this helps:)
        
                    
             
        
        
        
Answer:
ow mate why'd u remove? people found it helpful. 
Step-by-step explanation C'mon man
 
        
             
        
        
        
Answer:
I think this is the answer 36 unit