WAEC - Mathematics (2011 - No. 9)
Esther was facing S 20° W. She turned 90° in the clock wise direction. What direction is she facing?
N 70o W
S 70o W
N 20o W
S 20o E
Giải thích
The bearing S 20° W is equivalent to a bearing of 200°.
Moving clockwise 90° ⇒ 200° + 90°
= 290°
This is equivalent to N 70° W.