Answer:
A (DE = GF)
Step-by-step explanation:
In a isosceles trapezoid, one pair of segments are parallel, and another pair are equivalent in length. 
The only choice that fits this criteria is A, where DE equals GF. 
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
a^2+b^2=400
a^2=400-b^2
a=sqrt(400-b^2) & -sqrt(400-b^2)
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b^2=400-a^2
b=sqrt(400-a^2) & -sqrt(400-a^2)
 
        
                    
             
        
        
        
Answer:
It takes her 25.2 mintes
Step-by-step explanation:
You can just multiply 21 by 1.2 because that's how long she takes per lap and you can get 25.2
 
        
                    
             
        
        
        
mary is the 4th childs nam,e