"The bearing of church B from church A is 025°"
Amber is wrong.
Explain why.
Home > Maths quizzes > Grade 4 Quizzes > Bearings
Grade 4 • 4R • 10 Questions (28 Marks)
Explanation:
Every bearing must obey three rules: (1) measure from North, (2) measure clockwise, and (3) write the answer as 3 digits (e.g. 45° must be written as 045°). Look carefully at the word “from”: for the bearing of B from A, stand at A and measure clockwise from the North line at A.
Because North lines are parallel, the interior angles between two North lines are co-interior angles and add up to 180°. Use this (together with angles around a point = 360°) to calculate back bearings without a protractor.
Example 1: The bearing of ship B from port A is 065°. Work out the bearing of port A from ship B.
Example 2: Town Q is on a bearing of 295° from Town P. Work out the bearing of Town P from Town Q.