Application of polar coordinates. Batteship

In Mathland, we used our knowledge of polar coordinates to play a game if battleship. It was actually fun

Rules to battle ship

1. Set up your four ships on the coordinate graph. The points have to be adjacent to each other not diagonal. Don't show the opponent 

2. Each player gets one guess per turn. He declares a specific point on a graph (r,theta) and the other player will tell whether you hit or not. He must also tell you if the ship sank. A shirt sinks when it has been hit according to the length of it.

Highlighted would mean my ships or hits