A spider is sitting exactly in the middle of one of the smallest walls in a living room, whilst a fly is resting by the side of the window of the opposite wall, 1.5 m above the ground and o.5 m from the adjacent wall. The room is 5m long, 4m wide and 2.5m high. Work out the distance between spider and fly. (P.s: according to the answer sheet, the answer should be 5.23 m correct to 2dp, but i dont know how to get this answer)
The room and the location of the fly in the spider: