Teacher's Guide - Pearson

Exercise 10.2 (Student’s Book page 177)2. a) 050˚b) 080˚c) 340˚d) 220˚e) 050˚f) 330˚3. a)CN55˚75˚ B50˚Ab) i) 050˚ii) 305˚iii) 230˚ (180˚ + 50˚)Homework Activity (Student’s Book page 178)1. 270˚2. 180˚3. 000˚ (or 360˚)Extension Activity 10.1 (Student’s Book page 179)1. Let the bearing from B to A be x.Thus the bearing from A to B would be 180˚ 1 x[ 180˚ 1 x 5 4xx 5 60˚Bearing from B to A is 60˚ and the bearing from A to B is 180 o 1 60˚ 5 240˚2. 180˚ 1 x 5 7xx 5 30˚B è A is 30˚ and A è B is 210˚Activity 10.5 (Student’s Book page 180)Elevation: Line of sight is at an angle upwards from the horizontal (look up fromthe horizontal).Depression: Line of sight is at an angle downwards from the horizontal (cast youreyes downward from the horizontal).56 EXPLORING MATHEMATICS FORM 3