Triangle FGH is an isosceles right triangle with a hypotenuse that measures 16 units. An altitude, Line segment G J, is drawn from the right angle to the hypotenuse.

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?