Answer:
A, B, C
Step-by-step explanation:
The top right corner is the positive side of the graph. If it goes below the X axis or to left of the Y axis, it is negative. (thus, the negative numbers)
 
        
             
        
        
        
Answer:
45
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The answer is indeed with Right angles 
 
        
             
        
        
        
Answer:
B, C, and D
Step-by-step explanation:
Just some simple maths, look at it like railroad tracks and act it out as such, with lines a and b being parallel. Angle 6 is 75, Angle 1 is 105