Answer:
idk can u add a picture of the graph or diagram
Step-by-step explanation:
You can use trigonometry specially the cos rule in this case. I can’t send the other pictures. But using the cos rule you can check whether the angle is 90
Answer: C
Step-by-step explanation: 5pi converts to 15.70796
The slope is 2/3 because 3 - 1 = 2 and 0 - -3 = 3
Angle 1 is equal to 48°
if angle 3 and 2 are known you add them and subtract from 180