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JSS2: MATHEMATICS - 3RD TERM

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  1. Scale Drawing | Week 1
    3 Topics
    |
    1 Quiz
  2. Angles of Elevation & Depression | Week 2
    3 Topics
    |
    1 Quiz
  3. Pythagoras’ Theorem I | Week 3
    3 Topics
    |
    1 Quiz
  4. Pythagoras’ Theorem II | Week 4
    2 Topics
    |
    1 Quiz
  5. Area and Volume of Cones and Cylinders | Week 5
    3 Topics
    |
    1 Quiz
  6. Cones | Week 6
    3 Topics
    |
    1 Quiz
  7. Bearings and Distances I | Week 7
    2 Topics
    |
    1 Quiz
  8. Bearings and Distances II | Week 8
    2 Topics
    |
    1 Quiz
  9. Presentation of Data | Week 9
    6 Topics
    |
    1 Quiz
  10. Probability | Week 10
    6 Topics
    |
    1 Quiz



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Topic Content:

  • Three Figure Bearings (True Bearings)
  • Conversions between Compass and True Bearings
compass bearing Easy Resize.com

1. A three-figure bearing is always measured from North in a clockwise direction. 

2. A three-figure bearing is usually given in 3 – figures e.g., 035 (but 35º), 125º, etc. 

Due North = 000º
Due East = 090º
Due South = 180º 
Due West = 270º 

3. When the number of digits in a bearing is less than 3, always add extra zeroes before the bearing to make the digits three.

When writing true bearings, we always use 3 digits to describe the angle. If the angle measure is less than 100º, then we would write something like 040º (for 40º) or 004º (for 4º). This makes it clear that we are referring to a three-figure bearing (true bearing) measurement.

Example 8.1.1:

Write down the three-figure bearing of each of the following directions. 

(a) N 35º E
(b) N 60º W
(c) S 50º W
(d) S 48º E 

Solution

(a) N 35º E

Screenshot 2024 04 26 at 03.24.17
Bearing = 035º 

(b) N 60º W

First, draw the compass direction

Screenshot 2024 04 26 at 04.04.55
N 60º W

 Three figure bearings start from North in a Clockwise direction to meet the given point or direction. 

 

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