Coordinates

 Hi there marlin here with more maths DLO's and this time its about coordinates. Coordinates are things like if you have a square with on the x axis you have a-g grid and on the y axis is 1-7 and you wanted to mark the middle of that square you would say d-4 and you would hit the bulls eye. If you've played battleships you will probably know the coordinates but still please click this link