Answer:

Step-by-step explanation:



I don't know if I'm correct, I'm guessing... 30
I saw 180, 90, 45. That’s only because 360/8=45 so it’s symmetrical when rotated by a multiple of 45. Hope that helps
Yes this is equal because 3v+v is 4v and if you divide 12v by 3 you also get 4v
Answer:
21
Step-by-step explanation:
I hope this helps!