[17] 92°
The sum of two non-adjacent angles is equal to the exterior angle:
x + 45 = 2x - 2
47 = x
Then, 2x - 2 -> 2(47) -2 -> 92
[18] 114°
Pretty much the same process
24 + 2x + 18 = 3x + 6
42 + 2x = 3x + 6
36 = x
Then, 3x + 6 -> 3(36) + 6 = 114
[19] 158°
Annnd again, formatted differently though,
x + 90 + 3x + 2 = 180
4x + 92 = 180
4x = 88
x = 22
Then, 180 - 22 = 158
Have a nice day! - Sorry for the wait, I made it super complicated, still got the right answer, and then used the actual formula lol
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
