I believe you only need to know one angle.
For example, if you know angle 1, you can calculate angle 3. Angle 2 = angle 3 and angle 4 = angle 1.
Also, Angle 5= angle 1 and so on...
 
        
             
        
        
        
Answer:
|5| = 5 and |2| = 2 and because 5 > 2, our answer is |5| > |2|.
 
        
                    
             
        
        
        
Answer:
2.5 right?
Warning: Answer may be wrong. I don`t know, it`s 11 A.M so please forgive me. 
 
        
                    
             
        
        
        
Answer: GCF = 6 aquariums
Step-by-step explanation: