Answer:
70.5°
Step-by-step explanation:
22² = (20)²+(18)² - 2(20)(18) cos X
484 = 400 + 324 - 720 cos X
-240 = -720 cosx
1/3 = cos X
 = X
 = X
X = 70.52877937
 
        
             
        
        
        
It's $0.44 cents my good friend......
        
                    
             
        
        
        
Answer:
StartFraction 12 n over r EndFraction or A
Step-by-step explanation:
 
        
             
        
        
        
Vertical Angles: Theorem and Proof
Theorem: In a pair of intersecting lines the vertically opposite angles are equal. It can be seen that ray \overline{OA} stands on the line \overleftrightarrow{CD} and according to Linear Pair Axiom, if a ray stands on a line, then the adjacent angles form a linear pair of angles.