Kelly catches the football at the corner of his goal line and the East sideline at the South end of the stadium. He runs the ball to his $40$ yard line before being tackled by the opposing team's kicker. If Kelly is tackled $40$ yards from the East side line, what is the direction of his displacement? $($Side note: I have seen a couple of tutors answering this question saying that the answer is north. I don't really know much about football, but if the question says that he is getting tackled from the east side line wouldn't that mean he gets tackeled on the hypotenuse making the direction north west?