Answer:
A (2,-2.5)
Step-by-step explanation:
Is 2 units right and 2.5 units down, right where point C is. 
 
        
             
        
        
        
Answer:
8.
Step-by-step explanation:
13).
This is an equilateral triangle.
We see that all 3 angles are equal,  so all sides are equal also.
So 2x - 6 = 10
2x = 16
x = 8.
 
        
                    
             
        
        
        
Answer:
∠A = ∠D  (**but very important Δ ABC has to be congruent to Δ DEF)
Step-by-step explanation: 
It will help if you draw the triangles out and label the same sides. Then according to the side-angle-side (SAS) rule, ∠A should be equal to ∠D
 
        
             
        
        
        
Answer: 5425
Step-by-step explanation: