BEARINGS.

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Presentation transcript:

BEARINGS

Compass Directions There are four points of the compass: north, south, east and west. The direction halfway between north and west is described as north west. Similarly, the direction halfway between south and east is described as south east, the direction halfway between south and west is south west, and the direction halfway between north and east is north east.

Three-Figure Bearings Three-figure bearings are an alternative to compass bearings that are much more precise. They are measured in a special way: Start measuring from the direction North Measure clockwise Give the bearing using three figures (or more than three if there's a decimal)

Bearings 1. Measured from North. 2. In a clockwise direction. 3. Written as 3 figures. N S E W 315o 145o 230o 315o 230o 145o

A 360o protractor is used to measure bearings. We use a protractor to measure the bearing of each point from the centre of the circle. N S E W 090o 360/000o 270o 180o 350o 020o NW 315o NE 045o 290o 080o 250o SW 225o 210o 110o 160o SE 135o

Bearings B A Measuring the bearing of one point from another. To Find the bearing of B from A. B A 060o N 1. Draw a straight line between both points. 2. Draw a North line at A. 3. Measure the angle between.

Bearings B A Measuring the bearing of one point from another. To Find the bearing of A from B. B A N 1. Draw a straight line between both points. 240o 2. Draw a North line at B. 3. Measure angle between.

How are the bearings of A and B from each other related and why? Measuring the bearing of one point from another. N 060o B A 240o How are the bearings of A and B from each other related and why?

Bearings P Q Measuring the bearing of one point from another. To Find the bearing of Q from P. N 118o 1. Draw a straight line between both points. 2. Draw a North line at P. 3. Measure angle between.

Bearings P Q Measuring the bearing of one point from another. To Find the bearing of P from Q. N 298o 1. Draw a straight line between both points. 2. Draw a North line at Q. 3. Measure angle between.

How are the bearings of P and Q from each other related and why? Measuring the bearing of one point from another. N P Q 118o 298o How are the bearings of P and Q from each other related and why?

Bearings N S E W 090o 000/360o 270o 180o Worksheet 1

Bearings 1 B A Q P 2 Worksheet 3