Question -
Answer -
If we revolve one completeround in either clockwise or anti-clockwise direction, then we will revolve by360º and the two adjacent directions will be at 90º or of a complete revolutionaway from each other.
(a) If we start facingEast and turn clockwise to face North, then we have to make 
of a revolution.
(b) If we start facingSouth and turn clockwise to face east, then we have to makeof a revolution.
(c) If we start facingWest and turn clockwise to face East, then we have to make
of a revolution.
