Answer:
8
Step-by-step explanation:
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
|-6+8|
Add/subtract the numbers: -6 + 8 = 2 
= |2|
Apply the absolute value rule: |a| = a, a ≥ 0
= 2
 
        
             
        
        
        
The answer to the question
 
        
        
        
Solution
Step 1
Write an expression for the area of sector

Where
θ = 52°
π = 3.14
r = 8cm
Step 2
Find the area of the sector after substitution of values into the formula above.

To the nearest tenth the area of the shaded sector of circle C = 29.0cm²
 
        
             
        
        
        
For angles in first quadrant, the reference angle is itself. In second quadrant, the equation would be 180 - x where x is the measure of the angle. In third quadrant, x - 180. Lastly, in the fourth quadrant, the reference angle is 360 - x. From the second set of angles in the given, the reference angles are.
              (1) 135 ; RA = 180 - 135 = 45
              (2) 240; RA = 240 - 180 = 60
              (3) 270; RA = 90 (lies in the y - axis)
              (4) 330; RA = 360 - 330 = 30