The Red Letter was because it was blurry...I made it like that so it could be understandable: it is the letter ''B''
Hard to see...but
26. Angle 9 = Angle 3 ⇒ corresponding angles
27. Angle 4 is supplemental to angle 7.....so it equals 60
Angle 5 =40
So Angle 2 = 180 - 60 - 40 = 80
Angle 3 = Angle 5 = 40 alternate interior angles
So Angle 1 = 180 - Angle 2 - Angle 3
Angle 1 = 180 - 80 - 40 = 60
28. Angle 5 supplemental to angle 8 = 180 - 145 = 35
Angle 3 = Angle 5 = 35 alternate interior angles
Angle 2 = 180 - Angle 1 - Angle 3
Angle 2 = 180 - 37 - 35 = 108
29. Angle 4 = Angle 1 = 57 alternate interior angles
Angle 3 = 180 - Angle 1 - Angle 2
Angle 3 = 180 - 57 - 72 = 51
30. Angle 5 supplemental to angle 6 = 180 - 139 = 41
Angle 4 = 180 - Angle 5 - Angle 2
Angle 4 = 180 - 41 -68 = 71
Angle 7 supplemental to Angle 4 = 180 - 71 = 109