Here are some ​drawings and pictures.

Each one has a different scale.​​​​

​In this unit you will practise making and using scale drawings. You will also look at how scales are used in maps. The skill of working out real-life distances between places shown on a map is very useful. It enables you to estimate the distance to travel and how long it will take you. You will also learn about bearings. These are important in map reading. They give the angle of travel, from one place to another.

Using bearings

A bearing describes the direction of one object from another.

It is an angle measured from north in a clockwise direction.

A bearing can have any value from 000° to 360°. It is always written with three figures.

Using bearings

A bearing describes the direction of one object from another.

It is an angle measured from north in a clockwise direction.

A bearing can have any value from 000° to 360°. It is always written with three figures.

Worked example

The diagram shows three towns, A, B and C.

a Write down the bearing of B from A.

b Write down the bearing from A to C.

c Write down the bearing of B from C.

Worked example

a Write down the bearing of B from A.​​

Worked example

b Write down the bearing from A to C.

Worked example

c Write down the bearing of B from C.

Exercise 17.1

1 For each diagram, write down the bearing of B from A.

Exercise 17.1

2 The diagram shows the positions of a shop and a school.

a Write down the bearing of the shop from the school.

b Write down the bearing of the school from the shop.

Exercise 17.1

3 Ahmad goes for a walk.

The diagram shows the initial position of Ahmad (A), a farm (F), a pond (P), a tree (T) and a waterfall (W).

Write down the bearing that Ahmad follows to walk from one position to another.​

Exercise 17.1

4

a For each diagram, write down the bearing of Y from X, and X from Y.

Exercise 17.1

4

b Draw two different diagrams of your own, plotting two points X and Y.

In each diagram, the bearing of Y from X must be less than 180°.

For each of your diagrams write down the bearing of Y from X, and of X from Y.

Exercise 17.1

5 This is part of Dakarai's homework.

Exercise 17.1

Dakarai knows that any two north arrows are always parallel so

he uses alternate angles to work out the bearing of A from B.