Vector norm and distance between vectors

Picture this situation: the day is incredibly hot. You are on one corner of a square-shaped patch of flat land of size of 64 sq. ft. trying to find some shade. Then, you see an ice cream truck approaching the opposite corner. What is the length of the shortest path between you and cold ice cream? Write your answer rounded to the nearest hundredth. Keep in mind that there are no obstacles, and you can move in any direction.