Scale Drawings & Bearings
How would you guide this plane this plane to the airport?
Airport
Airport
N
100 km
To describe movement we need to know a direction and a magnitude.
“Turn 25° to your right and fly for 700 km.”
Airport
Why are instructions like
this not used?
Instead we use
absolute directions,
according to north.
N
100 km
The turn measurement (25°) is relative, it depends on knowing which
direction the aircraft is currently moving.
“Fly 700 km on a bearing of 011°.”
Airport
N
N
100 km
When we use maps, we use a bearing and a distance to describe movement.
030°
2.9 km
Bearings are always
at least 3 digits.
Why put a 0 in front of the 30°?
N
1 km
N
When we use maps, we use a bearing and a distance to describe movement.
090°
4 km
N
N
1 km
When we use maps, we use a bearing and a distance to describe movement.
180°
2 km
N
N
1 km
When we use maps, we use a bearing and a distance to describe movement.
270°
4 km
(180°+ 90°)
N
N
1 km
①
What is the bearing and distance of B from A?
1) Connect the points.
2) Measure the bearing with a protractor.
3) Measure the length & convert to real-life length.
B
N
A
3 km
1 cm represents 1 km
050°
7 km
②
What is the bearing and distance of B from A?
1) Connect the points.
2) Measure the bearing with a protractor.
3) Measure the length & convert to real-life length.
N
A
B
3 km
1 cm represents 1 km
100°
6 km
③
What is the bearing and distance of B from A?
1) Connect the points.
2) Measure the bearing with a protractor.
3) Measure the length & convert to real-life length.
N
A
6 km
1 cm represents 2 km
B
135°
10 km
④
What is the bearing and distance of B from A?
1) Connect the points.
2) Measure the bearing with a protractor.
3) Measure the length & convert to real-life length.
N
A
B
12 km
1 cm represents 4 km
(180°+ 60°)
240°
16 km
⑤
What is the bearing and distance of B from A?
1) Connect the points.
2) Measure the bearing with a protractor.
3) Measure the length & convert to real-life length.
B
N
A
3 km
1 cm represents 1 km
(180°+ 115°)
295°
9.5 km
⑥
What is the bearing and distance of A from B?
1) Connect the points.
2) Measure the bearing with a protractor.
3) Measure the length & convert to real-life length.
N
N
B
A
3 km
1 cm represents 1 km
(180°+ 80°)
260°
7 km
This is a map of the local area to the east of Sidnam.
2 km
a)
Abley
Brentam
N
Catford
Sidnam
Edding
Dufford
Flitwood
What is the bearing & distance of …
Abley from Sidnam?
Brentam from Sidnam?
Catford from Sidnam?
Dufford from Sidnam?
Edding from Sidnam?
Flitwood from Sidnam?
Scale Drawings & Bearings
This is a map of the local area to the east of Sidnam.
Scale Drawings & Bearings
2 km
a)
N
b)
N
4 km
N
N
B
C
Sidnam
A
What is the bearing & distance of …
What is the bearing & distance of …
B from A?
A from B?
C from B?
B from C?
A from C?
c)
30 km
X is 90km away from W
on a bearing 221°.
Mark point X.
Y is 75km on a bearing
of 335° away from X.
Mark point Y.
Z is on a bearing of 104°
and 135km away from Y.
Mark point Z.
W
This is a map of the local area to the east of Sidnam.
2 km
a)
Abley
Brentam
N
Catford
Sidnam
Edding
Dufford
Flitwood
What is the bearing & distance of …
Abley from Sidnam?
040°
6 km
Brentam from Sidnam?
060°
8 km
Catford from Sidnam?
075°
4 km
Dufford from Sidnam?
115°
7.5 km
Edding from Sidnam?
147°
3.5 km
Flitwood from Sidnam?
200°
4 km
Scale Drawings & Bearings
Half Answers
This is a map of the local area to the east of Sidnam.
2 km
a)
Scale Drawings & Bearings
N
b)
Abley
N
4 km
Brentam
N
Answers
B
N
C
Catford
Sidnam
A
Edding
What is the bearing & distance of …
What is the bearing & distance of …
B from A?
A from B?
C from B?
B from C?
A from C?
055°
235°
14 km
14 km
Dufford
Flitwood
105°
285°
260°
13 km
13 km
24 km
c)
30 km
X is 90km away from W
on a bearing 221°.
What is the bearing & distance of …
Abley from Sidnam?
040°
6 km
Mark point X.
Brentam from Sidnam?
060°
8 km
Catford from Sidnam?
075°
4 km
Y is 75km on a bearing
of 335° away from X.
Dufford from Sidnam?
115°
7.5 km
Edding from Sidnam?
147°
3.5 km
Z is on a bearing of 104°
and 135km away from Y.
Flitwood from Sidnam?
200°
4 km
Mark point Z.
Y
W
Mark point Y.
Z
X