A spider is sitting at A, the midpoint of the edge of the ceiling in the room shown in Figure
11-53. It spies a fly on the floor at C, the midpoint of the edge of the floor. If the spider must walk
along the wall, ceiling, or floor, what is the length of the shortest path the spider can travel to
reach the fly?
Let B is the point just below the point A on the opposite edge as shown - B ...
The shortest path is determined.