Okay I've been given a question about adding and subtracting vectors, and my physics teacher didn't even explain anything at all. Q1) What is the magnitude of the resultant of the addition of the vector P + S? Where P is 2 units north and S is 5 units east. I think I'd have to use Pythagoras' Theorem but seriously, I have no idea how to do this so if someone could PLEASE explain in detail and go through all the steps that would be awesome. Thanks.