Answer:
∠5
Step-by-step explanation:
A linear pair of angles create a straight line
The only angle that creates a straight line with ∠1 is ∠5 therefore cyan is the answer
It’s a very big question I may appreciate it when you make the question a little shorter
3 d - 12
3 * 10 - 12
30 - 12 = 18
Answer : 18
3 terms
https://youtu.be/0sq2PMQ_Nak
use that video to help you.