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AustraliaNSW
Stage 5.1-2

8.08 Bearings

Worksheet
True bearings
1

State the true bearing of the following:

a

Southwest

b

Northwest

c

West-Northwest

d

South-Southeast

e

Northeast

f

Southeast

2

Determine the true bearing of point B from point A in the following bearings diagram:

3

Determine the true bearing of point A from point B in the following bearings diagram:

Compass bearings
4

Consider the point A in the folowing diagrams:

i

Determine the true bearing of point A from O.

ii

Find the compass bearing of point A from O.

a
b
c
d
5

In the figure below, point B is due East of point A:

a

Find the true bearing of point A from point C.

b

Find the compass bearing of point A from point C.

6

Consider the following diagram:

a

Find the true bearing of point B from point C.

b

Find the compass bearing of point B from point C.

7

Consider the following diagram:

a

Find the true bearing of point C from point A.

b

Find the compass bearing of point C from point A.

8

Consider the following diagram:

a

Find the true bearing of point C from point B.

b

Find the compass bearing of point C from point B.

9

Determine whether the following diagrams display the point P with a compass bearing between N and W from the point O.

a
b
c
d
10

Determine whether the following diagrams show a true bearing of 296\degree \text{ T} for the point P from the origin O.

a
b
c
d
11

Determine whether the following diagrams display WNW:

a
b
c
d
12

If a person walks at a compass bearing of SW, and then turns around to go back in the direction they came, what direction are they heading now?

Applications
13

Consider the following diagram:

If the bearing of the clearing from the town is a \degree, find a to the nearest degree.

14

An aeroplane sets off on a bearing of 051\degree \text{T}. After some time, it needs to turn back and head to its original position. On what true bearing must it travel?

15

A boat sets off on a bearing of 125\degree \text{T} . After some time, it needs to turn back and head to its original position. On what true bearing must it travel?

16

Shortly after take-off, a plane is 42 \text{ km} south and 57 \text{ km} west of the airport in Sydney that it left from:

a

Find the size of the angle marked b, to one decimal place.

b

Hence, find the compass bearing of the plane from the airport.

c

State the true bearing of the plane from the airport.

17

The position of a ship S is given to be 20 \text{ km} from P, on a true bearing of 0 49 \degree \text{ T}. The position of the ship can also be given by its \left(x, y\right) coordinates.

a

Find the ship's x-coordinate to one decimal place.

b

Find the ship's y-coordinate to one decimal place.

18

On an orienteering course, Beth runs 1000 metres north from point A to point B, then turns east and runs to point C. If the true bearing of C from A is 062\degree \text{T} and the direct distance Beth must run to get back to point A is d metres, find d to the nearest metre.

19

During a group hike, a hiker walked 11\text{ km} \text{ NE} of base camp. In the evening the hiker was separated from the group and after a night lost in the wilderness, the hiker was found 11\text{ km} \text{ NW} of the base camp. What compass bearing must the hiker have followed during the night?

20

Luke sailed for 116 \text{ km} on a bearing of 231 \degree.

If w is how many kilometres west he has sailed from his starting point, find w to one decimal place.

21

During a rescue search, a helicopter flew west from point X to point Y, then changed course and flew 10.7 \text{ km} north to point Z.

If point Z is on a bearing of 335 \degree \text{ T} from point X:

a

Find the size of \angle YXZ.

b

If the distance from point Y to point X is b \text{ km}, find b to one decimal place.

c

If the distance that the helicopter must fly between point Z and point X is d \text{ km}, calculate d to one decimal place.

22

Three television presenters are practising their navigation skills before heading off on an expedition to a remote location.

Belinda at point B is positioned 17.6 \text{ m} south of Amelia at point A. Carl at point C is due east of Belinda and on a bearing of \text{S } 38 \degree \text{E} from Amelia.

If Amelia and Carl are d \text{ m} apart, find d to one decimal place.

23

A yacht sailed in a direction so that its final position was 248 \text{ km} west and 225 \text{ km} south of its starting point.

a

If the true bearing on which the yacht sailed is b \degree, find the value of b to one decimal place.

b

If the boat has sailed a total of d \text{ m}, find the value of d to one decimal place.

24

In remote locations, photographers must keep track of their position from their base. One morning a photographer sets out from base, represented by point B, to the edge of an ice shelf at point S on a bearing of 0 55 \degree. She then walked on a bearing of 145 \degree to point P, which is 916 \text{ m} due east of base.

a

State the size of \angle BSP.

b

Find the distance BS, to one decimal place.

c

Find the distance SP, to one decimal place.

d

If the photographer walks directly back to her base from point P, determine the total distance she would have travelled. Round your answer to one decimal place.

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MA5.2-13MG

applies trigonometry to solve problems, including problems involving bearings

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