First let us find


Now let;s solve the second part
 
 
        
             
        
        
        
A.)
Slope:-1/4
Y intercept: (0,13/4)
X intercepts:(13,0)
B.)
X intercepts:(3,0)
Y intercepts:(0,-3)
        
             
        
        
        
A............................................
        
             
        
        
        
Answer:
They are identical triangles.
Step-by-step explanation:
Angles in a triangle add up to 180 degrees.
The triangle with 39 and 90 has a missing angle of 51 degrees, and the triangle with 51 and 90 vice versa.
 
        
                    
             
        
        
        
Multiply 80 by 5/8ths. 
80*5/8=50