1. The problem statement, all variables and given/known data Vehicle drives from a to b (south 100mi), then from b to c (east 200mi), then from c to d (north 300mi). What is the straight line distance from d to a? 2. Relevant equations Not sure. Maybe Pythagorean theorem. 3. The attempt at a solution No idea really. I drew a diagram and labeled it and thats about as far as I got. Thanks.