public static boolean orthogonality ( int x1 , int y1 , int x2 , int y2 , int r1 , int r2 ) {
  int dsquare = ( x1 - x2 ) * ( x1 - x2 ) + ( y1 - y2 ) * ( y1 - y2 ) ;
  if ( dsquare == r1 * r1 + r2 * r2 ) return true ;
  else return false ;
}

public static boolean orthogonality ( int x1 , int y1 , int x2 , int y2 , int r1 , int r2 ) { int dsquare = ( x1 - x2 ) * ( x1 - x2 ) + ( y1 - y2 ) * ( y1 - y2 ) ; if ( dsquare == r1 * r1 + r2 * r2 ) return true ; else return false ; }
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