Bearings

Starter: Fill in the Blank
Calculate Scaled Measurements

\begin{alignedat}{4} \_\_&cm : &5&m \\ 4&cm : &40&m \end{alignedat}
\begin{alignedat}{4} 1&cm : &15&m \\ 8&cm : &\_\_&m \end{alignedat}
\begin{alignedat}{4} 1&cm : &3&m \\ \_\_&cm : &9&m \end{alignedat}
\begin{alignedat}{4} 1&cm : &\_\_&m \\ 9&cm : &360&m \end{alignedat}

1.

2.

3.

4.

Answers:         1.   3cm         2.   40m         3.   8cm         4.   90m

Scale Drawings with Angles: Aim

Understand that measurements in drawings can be calculated when we know the drawing’s angles. 

 

Can construct scale drawings using angles and sides, to measure unknown sides.

Bearings: Aim

Understand that a compass points North, which we can use to navigate by picking different directions.

 

Can name the main directions and write bearings in 3 digit form.

Scale Drawings with Angles: Understanding Check

Bearings: Understanding Check

Task:

Work on pg 58 exercises 3.1-6 for 20min

... and then we'll look at some aeroplanes! ✈

Bearings

Bearings are used every day to navigate and pilot ships and planes.

This is a

World War 2 Arvo Lancaster Bomber

The Cockpit (compass is in the top centre)

The Cockpit (compass is in the top centre)

WW2 RAF Compass (30° is written as '3' to make it easy to read from far away)

Bearings Rules

1. Start from North

2. Measure Clockwise

3. Write 3 Figures

N = North

E = East

S = South

W = West

NE = North-East

SE = South-East

SW = South-West

NW = North-West

Backup link to Geogebra Booklet:    https://www.geogebra.org/graphing/x9bw8ugb

TeeJay 2+ pg60–61 Exercise Answers

1.

a) 180° = S

b) 135° = SE

c)  045° = NE

d) 270° = W

e) 090° = E

f) 225° = SW

g) 315° = NW

2.

a) 135° = SE

b) 270° = W

c)  315° = NW

d) 000° = N

e) 180° = S

f) 045° = NE

g) 225° = SW

h) 090° = E

3.

a) 010°

b) 085°

c) 150°

d) 225°

e) 187°

f) 300°

4.

a) 360 - 10    = 310°

b) 360 - 165 = 195°

c) 360 -   8     =  352°

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