posted by Greg .
2 ships sail from the same por, one sails dew east at 15 mph and the second sailed dew south at 20 mph, how far apart are the ships after 3 hours? could you show the how you set this problem up?
They sail in perpendicular directions. The line connecting their locations is always the hypotenuse of a right triangle with perpendicular legs. After 3 hours, the legs of the triangle are 45 and 60 miles.
The hypotenuse (distance between them) is 75 miles at that time, according to the Pythagorean theorem.