What part of a clockwise revolution do you need to turn through, when you turn from facing north to west?
What part of a revolution have you turned through if you stand to face: (a) East and turn clockwise to face north? (b) South and turn clockwise to face east? (c) West and turn clockwise to face east?
Question 4 (a)
What part of a revolution have you turned through if you stand facing: East and turn clockwise to face north?