question_answer 11)

What part of a revolution have you turned through if you stand facing (a) East and turn clockwise to face North? (b) South and turn clockwise to face East? (c) West and turn clockwise to face East?

Answer:

(a) Here, the turn from East to South is one right angle from South to West is one right angle and from West to North is one right angle. So, the turn from East to North is three right angles. Hence, 3/4 of a revolution is required to turn from East to North. (b) Here, the turn from South to West is one right angle, from West to North is one right angle and from North to East is one right angle. So, the turn from South to East is three right angles. Hence, 3/4 of a revolution is required to turn from South to East. (c) Here, the turn from West to North is one right angle, from North to East is one right angle. So, the turn from West to East is two right angles. Hence, 1/2 of a revolution is required to turn from West to East.