Answer:

Step-by-step explanation:
For perpendicular lines, we use the same y-intercept. Though, to find the slope of perpendicular lines, we use opposite reciprocals. The opposite reciprocal of
is
.
Answer:
[-3,9]
Step-by-step explanation:
you look at the x axis
180° – 50° = 130°
130° / 2 = 65°
65° + 65° + 50° = 180°