Back to Exercise: Bearings and Scale Drawing

Exercises: Bearings and Scale Drawing

Bearings are always measured clockwise from North and written with three figures (e.g. $045\degree$ , not $45\degree$ ).

Grade 7·17 problems·~27 min·Uganda NCDC Primary 7 Mathematics·lesson·construction-04

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Recall / Warm-Up

Review the compass directions and three-figure bearing notation.

$Compass rose showing N, E, S, W with their corresponding three-figure bearings 000, 090, 180, 270$

What is the bearing of North?

$090\degree$

$000\degree$ (or $360\degree$ )

$180\degree$

A direction is read as $7$ degrees clockwise from North. Written as a proper three-figure bearing, this is ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ $\degree$ .

three-figure bearing:

Fluency Practice

Give the bearing of the compass direction South-West (SW) as a three-figure bearing: ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ $\degree$ .

three-figure bearing:

Give the bearing of North-East (NE) as a three-figure bearing.

To MEASURE the bearing of a point $B$ from a point $A$ on a diagram, what is the first thing you must draw at $A$ ?

A horizontal reference line at $A$ , then measure the angle up from it in either direction

A North line (a vertical arrow pointing up) at $A$ , since every bearing is measured clockwise from North, not from any other line

The line straight to $B$ first, then decide afterward which direction to measure the angle from

A bearing is measured off a diagram as $8$ degrees clockwise from North. Write this as a proper three-figure bearing.

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