As I look into the problem with a deeper meaning then math I realize this answer can be not as hard as it appears and it could be hard to answer it
The green arrow thing is a ray. So, question b. is a ray. So the dot would be B and the arrow would be C.
Do not click on that oh and I think the answer is a
Do 45 times 360 and you will get d as your answer
i hope this helped
X² = hyp² - cat²
x² = 625 - 156.25
x² = 468.75
x ≈ 21,6