I have problem about constructing graphs. Comparing these two problems: 1) A hiker walks 27.0km from her base camp at 35 degrees south of east. The next day, she walks 41.0 km in a direction 65 degrees north of east. In my book, the graph is like the one that i show you here. but why 65 degrees north of east is not the red angle that i drew but the blue angle? Now see the 2nd question, 2) A pet-store supply truck moves at 25.0 m/s north along a highway. INside, a dog moves at 1.75m/s at an angle of 35.0 degrees east of north. The graph that i show you here is what my teacher drew which is the blue angle. so why here the 35.0 degrees is not the red angle similarly to the graph of first question? I am really confused about drawing the angle with direction, i don't know which line should be the base of an angle, like in the first question, the base of 65 is the line below the x-axis, however, in the second question, it's the black line pointing to the north not the red line. Hope you can help me, thank you.