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Measuring length

What happens when a bus driver does not correctly estimate the height of his bus!

Length is a measure of how long or wide something is. Rulers and tape measures can be used to measure length.

Metric measurements

Length is measured in millimetres (mm), centimetres (cm), metres (m) or kilometres (km). These are known as metric units of length and are considered 'formal' units.
1 cm = 10 mm
1 m = 100 cm
1 km = 1000 m

Measurement today

Australia, the largest island in the world, measures 4000 kilometres from east to west and 3700 kilometres from north to south. The coastline stretches for about 36 735 kilometres.

As Australia is such a large country, measurements of this kind are very important when building new transport systems and taking care of our environment. Photographs taken from satellites can be used to find an accurate estimate of Australia’s coastline. 

The Metrix Length Activity