but i'll tell you where the vectors do come in handy. like, you got a crosswind, okay? let's suppose you're flying like this, and let's suppose the wind is a crosswind coming like this, just as fast as you're going. let's suppose you're going 100 kilometers per hour, and you're in a hurricane. and a hurricane is coming like this at 100 kilometers per hour. what's the direction of the aircraft gonna be? it's kind of easy to see, isn't it? it's kind of going like this. it's kind of going like this at the same time, right? and so what it does, it kind of goes off course like this, huh? let me give you a neat little rule that'll tell you exactly which way and how fast it goes. and the little rule is this. take your two vectors, one representing ground speed or the speed through the air, and the other representing the speed of the wind, and make those into a parallelogram. since they are right angles here, that parallelogram's gonna be, in this case, a square, because the sides are equal. make a square. and then what you do is you join from here to the diagonal, and you make