Question 965310: what is the longest line segment that can be drawn in a right rectangular prism that is 14 cm long, 13 cm wide, and 12 cm tall? Answer by Fombitz(32379) (Show Source): You can put this solution on YOUR website! From one corner to the furthest corner, L%5E2=14%5E2%2B13%5E2%2B12%5E2 L%5E2=196%2B169%2B144 L%5E2=509 L=sqrt%28509%29