i hope it helps mark me brainliest
Step-by-step explanation:
it is Parallelogram
The answer is (1,-5), If you put those two on a graph, that point is where they collide.
X=90 which (180-90) is 90 for m and n
Answer:

Step by step
Remember, a reference angle is a positive acute angle that represents an angle θ of any measurement.
a)
, then its reference angle is 
b)
is in the second cuadrant, then its reference angle is 
c)
, then it is in the first cuadrant and the reference angle is
.
d)
and it is in the third cuadrant, then its reference angle is 