84 ÷ 2 = 42
Check it to make sure.
2 × 42 = 84
42 and 2 can be multiplied to get 84.
        
             
        
        
        
Angles 7, 6, 3, 2 are all vertical angles, which mean they are congruent (equal) 
so if angle 7 is 115° so are 6, 3, and 2 
so the measure of angle 2 is 115°
        
                    
             
        
        
        
ANSWER
D) sin Y
EXPLANATION
The given triangle is a right triangle.
This implies that that:

Then we have

Recall that

But 

When we do the substitution, we get,

Therefore cos(x) is a equivalent to sin(y).
The correct answer is D.
 
        
             
        
        
        
For this case we have that by definition, the perimeter of the quadrilateral shown is given by the sum of its sides:
Let "p" be the perimeter of the quadrilateral, then:

So, the perimeter of the figure is: 
Answer:
