Answer: 
Step-by-step explanation:
Since, By the given diagram,
In quadrilateral ABCD, all angles are right angles ⇒ DC = AB = 15 cm and CB = DA
Also, In triangle DFA,

⇒ 
⇒ 
⇒ 
Now, In triangle, DEC,

⇒ 
⇒ 
⇒  
  
⇒ 
⇒ 
⇒ 
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
So far, we know that:
∠D = ∠J.
And that: 
DE:JK = 14:7 = 2:1
So, to prove that ΔDEF ~ ΔJKL by SAS, DF must be similar to JL, as those are the sides between the angle.  
So: 
DF:JL = 2:1.
Our answer is B. 
 
        
             
        
        
        
Answer: Divide 0.93333333333
Step-by-step explanation:
 
        
             
        
        
        
Answer:
That is quite simple,7 is the best choice