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WEEK 3
TOPIC: BEARING AND DISTANCES.
- The compass directions (major and minor)
- Types of bearing (Compass, acute-angle, three figure)
- Converting acute-angle bearing to three figures bearing and vice versa
- Reciprocal/ Back bearing
- Scale drawing to find bearing and distances
THE COMPASS DIRECTIONS
Major Compass/Cardinal Directions
There are four major directions used to describe locations. These cardinal directions are:
North (N); South(S), East (E) West (W).
The four main directions, North, South, East and West, divide the angle at a point (360°), into four equal parts and each is 90° or a right angle.
Minor Cardinal Directions
Other minor cardinal directions are those that lie in the midpoints as follows:
North and East called North-East (NE)
South and East called South-East (SE)
South and West called South-West (SW)
North and West called North-West (NW).
These minor cardinal directions subdivide each right angle into two equal parts such that the angle between each major cardinal and minor direction is 45°. The eight cardinal points are illustrated below:
BEARINGS AND ITS TYPES
In simple terms, bearing is the direction of one point with respect to a given point.
If a line which points due North of a compass is fixed, the direction of any other line on the surface of the earth is given as the angle which it makes with the North-pointing line, this angle is called bearing. In particular, we must note that the bearing is measured from the line due North in a clockwise direction
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