Find the length of the third side. If necessary, write in simplest radical form.
                                             
                                          
                                          
                                        
											 
											Let the third side be x :
( 3√5 )^2 = 6^2 + x^2
45 = 36 + x^2
x^2 = 45 - 36
x^2 = 9
x = 3