First find the area of the circle then divide it by 4
        
             
        
        
        
-/7? imagine that there is an -1 as the numerator. so now -/7 turns into -1/7
        
             
        
        
        
5 treats divided by six groups of one dog, or in easier terms, five dog treats divided up for 6 dogs. As a fraction, just remove the words except for 5, divided by, and 6, to give you 5/6. Hope this helped.
        
             
        
        
        
72⁰_______3π m 
360⁰______15π m 
C = 15π = 2π r 
r = 7•5 m