Answer:
25
Step-by-step explanation:
because there are vertical angles
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
Exterior angle = 360/n
= 360/13
= 27.7°
 
        
             
        
        
        
Answer:
A = 35 cm^2
Step-by-step explanation:
The area of a triangle is 
A = 1/2 bh where b is the base and h is the height
A = 1/2 ( 10)(7)
A = 35 cm^2
 
        
                    
             
        
        
        
I wanna day, that both are correct because they substituted the same value into both expressions and the results are the same. 
Both squares substitute in 6 and both equal -5.
        
             
        
        
        
We can employ a simple repeated decimal trick:



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Alternatively, we can compute the partial sum of the series.





As  , the second term vanishes and we're left with
, the second term vanishes and we're left with  . Notice that this is really just a more formal version of the earlier trick.
. Notice that this is really just a more formal version of the earlier trick.