Two vertical poles 2 meters and 8 meters high stand apart on a horizontal plane . What is the height in meters of the point of intersection of the lines joining the top of each pole to the bottom of the other pole ?
The points -LRB- 1 , 2 -RRB- and -LRB- 1 , 6 -RRB- are two vertices of a square . Where are the other two vertices ? Is this solution unique ?