Not that this question is going to pop up on your screen in GMAT, but it could be a test of your concepts:
It goes like this:
Three birds started flying from a point with same constant speed. Two of the birds are flying in opposite directions to each other and the third one is flying in any other direction. If at any point of time, their respective positions are plotted, what kind of triangle will we formed?
A right triangle will be formed. However, this assumes that the birds indeed fly straight. Because if not then this could be a critical reasoning question, so to speak. :
Far better is it to dare mighty things, to win glorious triumphs, even though checkered by failure... than to rank with those poor spirits who neither enjoy nor suffer much, because they live in a gray twilight that knows not victory nor defeat.
- T. Roosevelt