Answer:

Step-by-step explanation:
To convert from degrees to radians
radian = degree measure 
= 510 × 
= 
=
radians
Answer:
-2
Step-by-step explanation:
line crosses the y- coordinate (0,-2)
In order to name the coordinates, you read the X axis first and then the Y axis. So A would be (-4, 4). B would be (-4, 6). C would be (2, 4).
They are not congruent because each angle is a different measure.
Hope this helped! :)