5. Find the distance between the boats

Two boats \(A\) and \(B\) approach the shore from the north and the east, respectively. If boat \(A\) is at a distance of 9 \(km\) and boat \(B\) is at a distance of 12 \(km\). Calculate the distance between the boats.

 

 

Answer:

 

The distance between the boats \(=\)  \(km\).