Answer:
see explanation
Step-by-step explanation:
3) line l and m are perpendicular so they intersect at 90 degrees
I labelled the angles that are the same measure.
2x + 23 = 90 subtract 23
2x = 67 divide by 2
x = 23.5 degrees
4) 2m + 66 = 120 subtract 66
2m = 54 divide by 2
m = 27 degrees
